Check back here for new announcements – Spring 2021

In addition to onsite collaboration, researchers interact with the CRF through a variety of workshops and databases sponsored by the CRF. Examples include the International Workshop on Measurement and Computation of Turbulent Nonpremixed Flames and the Thermodynamics Resource. Due to the COVID-19 pandemic, however, the CRF has not held in-person workshops since March 2020. Please check back here for Spring 2021 updates.

Fabulous at Forty!

Fueling the Future Established at Sandia National Laboratories in Livermore, California, as the first U.S. Department of Energy (DOE) user facility, since the early 1980s the Combustion Research Facility (CRF) has served as a national and international leader in combustion science and technology for more than 40 years. As the nation responded to the 1970s…

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Sandia Celebrates Women in Research

Sandia researcher shares her story At a March 2021 Sandia Labs celebration of Women’s History Month, Dr. Jacqueline (Jackie) Chen—senior scientist in the chemistry, combustion, and materials science division at Sandia’s Livermore, California site—shares her success stories and career path to inspire other women in research. Jackie, honored in 2020 as one of eight national…

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Fuel property put to the test

Sandia postdoc receives SAE Excellence in Oral Presentation Award for phi-sensitivity research Understanding the fundamentals of phi-sensitivity, a key fuel property that represents how the autoignition reactivity of the fuel varies with the fuel/air equivalence ratio, will help us increase the efficiency and facilitate the development of practical low-temperature gasoline combustion engines, according to research…

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Outstanding Technology: Ducted Fuel Injection

Sandia researchers won an Outstanding Technology Development Award for its work on ducted fuel injection (DFI), a patented technology that slashes emissions of soot and nitrogen oxides from diesel engines by about 80% and is synergistic with sus­tainable liquid fuels like biodiesel. According to Chuck Mueller, who leads the project, DFI is a simple, mechan­ical…

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High school engineering students visit CRF

Livermore High School science teacher Karen Fletcher and 12 sophomore students from the Green Engineering Academy got to see applied science in action during a Feb. 19, 2020, visit to Sandia’s California campus. Students met several Sandia engineers who shared their combustion research expertise. James Siacunco talked about his career path and led by a…

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Hanging out with the stars

Sandia establishes collaborative research facility to study pervasive and versatile low-temp plasmas Low-temperature plasma—the most pervasive state of matter in the universe—consists of gaseous mixtures of ions and electrons that interact with background neutral atoms or molecules to make them reactive. It also generates energetic photons. All this activity means there’s no shortage of plasma…

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CRF confronts COVID-19 and gets back to work

The 2020 outbreak of COVID-19 affected all of the Labs’ sites with enforced stay-at-home orders in most locations. The Chemistry, Combustion and Materials Science Center, including the CRF, is located in California where the governor mandated a statewide quarantine in March 2020, which stayed in force for more than eight weeks. Sarah Allendorf, Center Director,…

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Announcing the continuation of the Spray Combustion Consortium

We invite you to join the next phase – transferring basic research into more predictive spray combustion CFD models thereby reducing development time and costs of future high-efficiency engines. Background The Spray Combustion Consortium (SCC) is an industry-funded activity aiming to improve engine combustion system design and optimization tools. Formed in late 2015, this industry…

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New engine optics to fuel future research

by Michael PadillaSandia team develops optical diagnostic that helps improve fuel economy while reducing emissionsA new optical device at Sandia National Laboratories that helps researchers image pollutants in combusting fuel sprays might lead to clearer skies in the future.An optical setup developed by researchers at Sandia’s Combustion Research Facility and the Technical University of Denmark…

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Hope Michelsen elected OSA Fellow

by Micheal PadillaHope Michelsen, a distinguished member of the technical staff at Sandia’s Combustion Research Facility, has been elected as a Fellow Member of The Optical Society (OSA).Hope is honored specifically for pioneering contributions to the fundamental understanding of laser-radiation interactions with soot particles through laser-induced incandescence (LII), absorption, and scattering, and using LII to…

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Watching molecules move

Velocity-Mapped Ion Imaging hits 30 years of research at SandiaBy Michael PadillaThirty years ago, David Chandler (8300) built an apparatus at Sandia’s Combustion Research Facility to image the fragments of a molecule as it fell apart. At the time, David had no idea what a tremendous impact his research would have on understanding how molecules…

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Finding a molecular needle in a haystack

Sandia Labs creates better ‘fingerprints’ to detect elusive, valuable chemical compounds By Sarah Sewel Imagine being able to see the entire Statue of Liberty and a small ant on its nose simultaneously. The drastic difference in size between the two objects would seem to render this task impossible. On a molecular level, this is exactly…

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Sandia hosts Chinese delegation

by Michael Padilla Opening doors for innovation and entrepreneurships opportunities is key for Sandia/California.  As part of that commitment, Sandia/California hosted a delegation of municipal leaders from Luzhou, China, on Thursday, April 20. Luzhou, located in the Sichuan Province of China, is known as the wine city of China.  “Partnering with the City of Livermore to…

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Spray Combustion Consortium formed to improve engine design

by Michael Padilla Sandia National Laboratories has formed an industry-funded Spray Combustion Consortium to better understand fuel injection by developing modeling tools. Control of fuel sprays is key to the development of clean, affordable fuel-efficient engines. Intended for industry, software vendors and national laboratories, the consortium provides a direct path from fundamental research to validated…

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Understanding hazardous combustion byproducts reduces factors impacting climate change

Sandia researchers focus on soot, furans, oxygenated hydrocarbons By Michael Padilla  Researchers at Sandia’s Combustion Research Facility are developing the understanding necessary to build cleaner combustion technologies that will in turn reduce climate impact.  Their work focuses on understanding the oxidation chemistry of organic carbon species critical to many processes including controlling emissions of toxic…

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Sandia develops autoignition model designed for efficient, accurate engine simulations

By Michael Padilla Researchers at Sandia National Laboratories have developed a model for how diesel engines autoignite that should lead to increased engine efficiency and a better understanding of how pollutants form. Sandia postdoctoral researcher Layal Hakim, working with mentors and Sandia principal investigators Guilhem Lacaze and Joe Oefelein, designed and implemented an optimized chemical…

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Robert Kolasinski wins DOE Early Career Award

By Michael Padilla Robert Kolasinski (8366) has received a $2.5 million, five-year Early Career Research Program award from the Department of Energy’s (DOE) Office of Science to support his work on how intense fusion plasmas interact with the interior surfaces of fusion reactors. Robert’s research will develop the scientific foundations needed to determine how reactor…

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Mark Musculus named SAE fellow

by Michael Padilla Sandia National Laboratories combustion researcher Mark Musculus has been named a fellow of SAE International, formerly the Society of Automotive Engineers. Established in 1975, the fellow designation honors long-term SAE members who have made a significant impact on society’s mobility technology through leadership, research and innovation. Only about 20 of SAE’s more…

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Jackie Chen to give keynote address at ISC High performance conference in Germany

By Michael Padilla Jackie Chen, distinguished member of technical staff at the Combustion Research Facility, is scheduled to deliver the keynote address on Tuesday, June 21, at the ISC High Performance conference in Frankfurt, Germany. The keynote session will highlight contributions from female researchers and scientists in advancing the field of computational science. Jackie will…

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Free-Piston Engines: A Possible Route to Hybrid-Electric Vehicles

A Sandia team is pursuing a novel route to hybrid-electric vehicles: the free-piston engine. So called because the piston is not mechanically linked to other engine systems, such as the crankshaft, the free-piston engine may provide greater efficiency than its conventional diesel and gasoline counterparts. Fueled by renewably sourced hydrogen, it also could one day…

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Download a Special Edition of the CRF News

Download a special edition of the CRF News. This printable pdf newsletter includes coverage of the 35th International Symposium on Combustion, Robert Barlow’s Alfred C. Egerton Gold Medal from the Combustion Institute, the CRF’s 2014 Workforce Development for Teachers and Scientists Program, Dennis Seibers’ retirement, and more.

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CRF Seismic Retrofit Complete

On Friday, Sept. 12, Sandia National Laboratories completed a three-year seismic retrofit of the Combustion Research Facility’s (CRF’s) building 905 to ensure that the building meets the newest earthquake codes. Sandia/California’s Physical Operations Planning & Studies department led the conceptual planning process, starting in August 2011. When the plans were approved, Sandia engaged Overaa Construction,…

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35th International Combustion Symposium a Resounding Success

The 35th International Combustion Symposium, the premier conference on combustion science and application held on August 3–8 in San Francisco, was a resounding success thanks to Sandia’s Combustion Research Facility (CRF). More than 1,500 researchers gathered from around the world to discuss the latest innovations in understanding and predicting combustion-related phenomena, approximately 250 more than…

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ACME: Climate Modeling Powered by DOE Supercomputers, Tamed by Uncertainty Quantification

Facing increasing evidence of climate change, scientists around the world are working to improve climate modeling, hoping to provide decision makers solid projections to guide the development of mitigating policies. Khachik Sargsyan is leading a Sandia effort to strengthen climate models through uncertainty quantification (UQ) for the Accelerated Climate Model for Energy (ACME) program. The…

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Robert Barlow Awarded Combustion Institute’s Alfred C. Egerton Gold Medal

Sandia National Laboratories scientist Robert Barlow was awarded the Alfred C. Egerton Gold Medal at the 35th International Symposium on Combustion in San Francisco on August 6. Given every two years by the Combustion Institute, the award recognizes “distinguished, continuing, and encouraging contributions to the field of combustion.” Lawrence Harding of Argonne National Laboratory won…

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CRF Reunion Luncheon Brings Together Staff, Retirees, Postdocs, and Visitors

With more than100 visiting researchers each year, many paths cross at the Combustion Research Facility. The CRF reunion luncheon, held during the 35th International Symposium on Combustion in San Francisco the first week of August, brought together a number of current staff, retirees, past and present postdocs, and other visitors. Three CRF directors were in…

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Students and Professors Spend the Summer at Sandia under DOE’s WDTS Program

This past summer, the CRF was the research home to 11 students and 2 professors who participated in the DOE Office of Science’s Workforce Development for Teachers and Scientists (WDTS) Program. By allowing students and professors to conduct research internships at national laboratories, this program is helping to develop the next generation of scientists, teachers,…

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SAE International Honors CRF Researchers for Outstanding Presentations

Solid technical work is great—but the ability to communicate effectively about that work is equally critical. To acknowledge the importance of good communication—and maintain a high quality of presentation at its technical meeting—SAE International established the SAE Excellence in Oral Presentation award in 1972. This year, two Sandians, Joseph Oefelein and Lyle Pickett, were honored…

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New Diagnostic Capability Provides 3-D Measurements of Turbulent Flame Dynamics Using High-Repetition Rate Tomographic Particle Image Velocimetry

Capturing turbulence–flame interaction structure and studying time–history effects requires high-speed volumetric measurements performed at repetition rates sufficiently fast to resolve the relevant flow time scales. Advances in the CRF’s imaging diagnostic capabilities are overcoming these challenges to provide a more complete picture of the structure and dynamics of turbulence–flame interactions. The Advanced Imaging Laboratory has…

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VFP Professor Balint Sztaray Continues CRF Collaboration

Over the past two summers and a sabbatical semester in 2013, University of the Pacific (UOP) chemistry professor Balint Sztaray and his research group have been working with the CRF’s David Osborn on a project to improve the selectivity of the current multiplexed gas-phase chemical kinetics instrument. Specifically, the two researchers are focusing on developing…

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Faculty and Students Pursue CRF Research under DOE Programs

The DOE Office of Science Workforce Development for Teachers and Scientists (WDTS) initiative maintains a decades-long legacy of developing the next generation of scientists, teachers, and engineers. Today, undergraduates, graduate students, and postdoctoral researchers across the country are performing R&D at universities and national laboratories partially funded by grants from WDTS programs. The CRF is…

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Paul Miles Appointed Manager of Engine Combustion Department

On June 6, Paul Miles became manager of the CRF’s Engine Combustion Department, which focuses on building the science base needed by industry to develop new generations of high-efficiency, clean engines. He took over the helm from departing manager Dennis Siebers, who recently retired from Sandia National Laboratories. Paul brings a wealth of experience to…

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Sandia to demonstrate Hydrogen Risk Assessment Models toolkit prototype

With recent hydrogen fuel cell vehicle market acceleration, cities and neighborhoods where these cars are being sold exhibit a growing need to advance hydrogen fueling system deployments. Understanding and assessing hydrogen-fueling and -storage system risks is a challenging proposition because the necessary scientific information is diffuse and found only in isolated published papers, within research…

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CRF Research Seeks to Improve Confidence in Large Eddy Simulations

Allowing solutions unattainable with direct numerical simulation and offering far greater accuracy than conventional engineering methods, large eddy simulation (LES) is now widely used for studying complex thermophysics in propulsion and power systems. However, because LES demands extremely complex tools, predictive LES has been problematic, leading to sometimes ambiguous results and suboptimal use of expensive…

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First Kevin E. Strecker Award Presented at Rice University

The Combustion Research Facility (CRF) sends warm congratulations to Joseph Barchas of Rice University, the first recipient of the Rice University’s Kevin E. Strecker Award. Joseph received the $2,000 award from the Department of Physics and Astronomy for developing the department’s best master’s thesis, Electrostatic Energy Exchange in Shock Acceleration, which he worked on with…

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EERE Officials Visit CRF

  On April 14, officials from the DOE’s Office of Energy Efficiency and Renewable Energy (EERE) visited the Combustion Research Facility. The guests included David Danielson, EERE Assistant Secretary; Reuben Sarkar, Deputy Assistant Secretary for Transportation; Kevin Fitzmaurice, Special Assistant to the EERE Assistant Secretary; Libby Wayman, Director of the Clean Energy Manufacturing Initiative; Austin…

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Sandia, Hawaii Hydrogen Carriers Partner on Hydrogen Storage System for Forklifts

Zero-emission hydrogen fuel cell systems soon could be powering the forklifts used in warehouses and other industrial settings at lower costs and with faster refueling times than ever before, courtesy of a partnership between Sandia National Laboratories and Hawaii Hydrogen Carriers (HHC). The goal of the project is to design a solid-state hydrogen storage system…

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Sandia Engaged in Upcoming Combustion Symposium and Workshops

A number of CRF staff members are active in organizing the 35th International Symposium on Combustion. This biennial event, which brings together more than 1,000 scientists, engineers, and others from around the world to explore the latest developments in combustion science, will be held from August 3–8, 2014, at the Hyatt Regency Embarcadero in San…

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Daniel Dedrick serves on California Energy Commission’s 10th Integrated Energy Policy Report Workshop Panel

On April 10, Daniel Dedrick participated in the California Energy Commission’s (CEC) 10th Integrated Energy Policy Report Workshop, “The State of Alternative Transportation Technologies Over the Next 10 Years.” Daniel was a member of the Hydrogen Fueling Systems Panel, along with Aaron Harris of Air Liquide; Matt McClory of Toyota; and Brendan Shaffer of the…

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February CRF Visitor Departures

Xiaoying Han 2/3/2014-2/14/2014 Host: Habib Najm As part of an ongoing collaboration with Habib Najm, Professor Xiaoying Han of Auburn University (Alabama) returned to the CRF to continue research on methods for model reduction in stochastic chemical systems. Prof. Han’s work is focused on developing a theoretical framework for dynamic analysis and model reduction in…

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Postdoctoral Researcher Oliver Welz Moves on to Next Challenge

Oliver Welz, a postdoctoral researcher in the CRF’s Combustion Chemistry group since 2010, will soon be taking on a new challenge as head of a research group in chemical kinetics at the University of Duisburg-Essen in Germany. In this position, the first step to becoming a full professor within the German university system, Oliver will…

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Portable Hydrogen Fuel Cell Unit to Provide Green, Sustainable Power to Honolulu Port

Clean hydrogen power that’s expected to lower emissions and reduce energy consumption will be coming to the Port of Honolulu in 2015 after the completion of a new fuel cell technology demonstration, one that could lead to a commercial technology for ports worldwide. The work comes on the heels of last year’s study and analysis…

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CRF Visitors, January 2014

Adam Wahab 9/16/2013-1/21/2014 Host: Wayne Staats During a several-month visit, Adam Wahab assisted Wayne Staats, Jeff Koplow, Justin Vanness, and Ryan Gorman in developing a new lighting technology that uses a variant of the Sandia Cooler—a highly efficient heat exchanger for microelectronic devices—to cool the LED array. Specifically, Adam created numerical multiphysics models of a…

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New Conceptual Insights into Diesel Engine Fuel-Injection Processes

By Joe Oefelein By combining advanced theory and high-fidelity large eddy simulation, CRF researchers Rainer Dahms and Joe Oefelein have provided new conceptual insights that promise to improve the understanding and prediction of fuel-injection processes at high-pressure diesel engine conditions. Their results, which were corroborated by experiments performed by CRF researchers Lyle Pickett and Julien…

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New Polarized-Depolarized Measurement Capability Extends Use of Raman/Rayleigh Methods to More Flame Types

By Robert Barlow Allowing single-shot measurements of all major species in nonsooting flames of simple fuels, such as H2 and CH4, spontaneous Raman scattering has been a key CRF laser diagnostic technique for fundamental turbulent-combustion studies. However, laser-induced fluorescence from soot precursors tends to interfere significantly with Raman scattering signals—limiting this method’s utility. Such fluorescence…

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Uncertainty Quantification in Chemical Systems with Reaction Mechanisms Employing Rate Rules

A team of researchers—Jens Prager, formerly at the CRF and presently at the engineering simulation software firm CD-adapco; Habib Najm and Khachik Sargsyan of the CRF; Cosmin Safta of Sandia’s Computer Sciences and Information Systems center; and William Pitz of Lawrence Livermore National Laboratory—have studied the impact of uncertainty of reaction-rate constants in chemical ignition…

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Sandia Hosts Visitors from Japanese Automotive Industry

On Nov. 7 and 8, Sandia hosted visiting fuel cell electric vehicle engineers from the Japanese automotive industry. On the first day of the visit, engineers from the Nissan Technical Center North America learned more about Sandia’s work in fueling research and the Center for Infrastructure Research and Integration (CIRI). Sandia is forming industrial partnerships…

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New Methods Allow Prediction of Pressure Dependence in Chemical Reactions

Seeking to free researchers from a nearly exclusive dependence on empirical models, CRF researcher Ahren Jasper and Argonne National Laboratory researchers James A. Miller and Stephen J. Klippenstein have developed a set of theoretical methods for predicting the rates of collisional energy transfer that govern pressure dependence.1 Enabled by both the increased availability of high-performance…

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Sandia/AIST Meeting Highlights Energy Research Collaboration between U.S. and Japan

As part of a broader effort to coordinate clean-energy research across the Pacific Ocean, Sandia National Laboratories is hosting a meeting with the Japan National Institute of Advanced Industrial Science and Technology (AIST) on December 13, 2013. Attendees from AIST and the U.S. national labs will be joined by representatives from the U.S. Department of…

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Novel Spectroscopic Method Reveals Intermediates over a Broad Spectrum

CRF researcher Leonid Sheps has developed a new spectroscopic method, Time-Resolved Broadband Cavity-Enhanced Absorption Spectroscopy (TR-BB-CEAS). The new technique is capable of following the time evolution of transient intermediates as they are produced and consumed in a gas-phase chemical reaction by monitoring their absorption of near-UV to visible light (300–700 nm). Existing absorption techniques can…

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CRF Summer Visiting Faculty Opportunities – Apply by January 10, 2014

The Combustion Research Facility is seeking visiting faculty researchers for 10-week appointments in summer 2014. The Visiting Faculty Program (VFP) seeks faculty members and their students at institutions historically underrepresented in the research community in order to expand the workforce vital to DOE mission areas. Faculty members develop a proposal in partnership with a CRF…

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CRF Summer Undergraduate Internship Opportunities – Apply by January 10, 2014

The Combustion Research Facility is seeking undergraduate and community college interns for 10-week appointments in summer 2014. Interns will be paired with a CRF scientist to conduct experimental, computational, or modeling research related to CRF programs. Applicants must be U.S. citizens majoring in math, physical science, or engineering, with a minimum GPA of 3.2/4.0. These…

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Craig Taatjes To Be Awarded Polanyi Medal for Pioneering Work in Combustion Chemistry

Sandia combustion chemist Craig Taatjes, whose groundbreaking work on Criegee intermediates has provided scientific insight into hydrocarbon combustion and atmospheric chemistry, has been selected to receive the prestigious Polanyi Medal at the 23rd International Symposium on Gas Kinetics and Related Phenomena, which will be held on July 20–25, 2014, in Szeged, Hungary. In addition to…

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A New Concept for Time-Resolved Fourier-Transform Spectroscopy

In developing the dual etalon frequency comb (DEFCOM) spectrometer, CRF researchers Haifeng Huang and David Chandler are refining a new concept for time-resolved Fourier-transform (FT) spectroscopy based on the interference between two transient frequency combs. By opening the door to many potential uses—including time-resolved, high-resolution, broad-band spectroscopy with a microsecond time-scale—DEFCOM may prove instrumental in…

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CRF Visitors, September 2013

Niels Leermakers 5/1/2013-9/13/2013 Host: Mark Musculus Niels Leermakers, a Ph.D. candidate from Eindhoven University of Technology in The Netherlands, visited the CRF for four months to collaborate with Mark Musculus on a DOE project to better understand details of the temporal and spatial evolution of soot and soot precursors under low-temperature combustion (LTC) conditions.  Working…

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Four CRF Papers Presented at the International Conference on Hydrogen Safety

CRF researchers presented four papers at the 5th International Conference on Hydrogen Safety, held September 9–11, 2013, in Brussels, Belgium. ICHS 2013 focused on progress in safety of hydrogen technologies and infrastructure, as crucial/essential means to enable the transition to a zero carbon energy system. The conference was hosted by the Joint Research Centre (Institute…

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Joe Pratt Presented Market Transformation Work at Two Conferences

Joe Pratt presented work for DOE’s Market Transformation group at two international conferences.  At the Society of Automotive Engineers Aerospace Alternative Fuels and Associated Environmental Impacts Symposium in Brussels, Belgium on June 13, 2013, Joe gave a DOE-prepared talk on the work the Market Transformation group is doing in the airport and aircraft realm.  At…

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Sandia Signs Letter of Understanding with H2USA

Sandia National Laboratories recently signed a Letter of Understanding with H2USA, a new public-private partnership launched by DOE to focus on advancing hydrogen infrastructure to support more transportation energy options for U.S. consumers, including fuel cell electric vehicles (FCEVs). The partnership brings together automakers, government agencies, gas suppliers, and the hydrogen and fuel-cell industries to…

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Negative Valve Overlap: A Key to Controlling Lean, Gasoline Auto-Ignition?

By Richard Steeper The drive for cleaner, more efficient engines has pushed research toward low-temperature gasoline combustion (LTGC) strategies that offer hope of achieving mandates for ultra-low engine-out emissions. Such strategies typically exploit auto-ignition to avoid the high-temperature flames associated with spark ignition. However, this approach makes LTGC control a difficult challenge, especially during part-load…

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Lyle Pickett Named SAE Fellow

Lyle Pickett has been named a Fellow of the Society of Automotive Engineers (SAE). Established in 1975, the Fellow grade honors and recognizes important engineering, scientific, and leadership achievements to enhance the status of SAE’s contributions to the profession and to society. Lyle was selected based on his pioneering research on direct-injection engine fuel sprays…

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CRF Article Chosen by The Journal of Chemical Physics to Commemorate 80th Anniversary

A 2012 article by CRF researchers David Chandler and the late Kevin Strecker, “Dual-etalon frequency-comb cavity ringdown spectrometer” was chosen by The Journal of Chemical Physics as one of 80 articles to highlight the 80 years of outstanding work published in the journal. Recently retired CRF researcher Steve Binkley is an author on a 1982…

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Two CRF Papers Named Distinguished for 34th International Symposium on Combustion

Two papers by CRF researchers have been named Distinguished Papers for the 34th International Symposium on Combustion. “Synchrotron photoionization measurements of fundamental autoignition reactions: Product formation in low-temperature isobutane oxidation” by Arkke J. Eskola, Oliver Welz, John D. Savee, David L. Osborn, Craig A. Taatjes (all Combustion Research Facility) was selected as the Distinguished Paper…

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Sandia Presented at the 14th Biennial Conference on Transportation Energy and Policy

Sandia participated in the 14th Biennial Conference on Transportation Energy and Policy on August 6–9 in Pacific Grove, California. This conference is organized under the auspices of the Alternative Fuels Committee of the U.S. Transportation Research Board and is hosted by the Institute of Transportation Studies at UC Davis. This conference focused on national and…

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Sandia Participated in the 3rd Annual Technology Forum of the U.S.-China Clean Energy Research Center – Clean Vehicles Consortium (CERC-CVC)

U.S. and China leaders and researchers involved in the DOE CERC-CVC gathered in Beijing, China, to discuss recent research progress and refine project plans for the remaining 2½ years of the 5-year consortium. The CERC-CVC is one of three U.S.-China Clean Energy Research Centers; the other two consortia focus on clean coal and building energy efficiency.…

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David Osborn Receives Lockheed Martin NOVA Award

Chemist David Osborn was recently awarded a Lockheed Martin NOVA Award. This award honors individuals who have made outstanding contributions to Lockheed Martin’s mission and business objectives in the four categories of exceptional service, leadership, teamwork, and technical excellence. David received a Technical Excellence Award for his groundbreaking methods in multiplexed chemical analysis, particularly synchrotron…

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CRF Researchers Make Significant Contributions to Laser Diagnostics in Combustion Conference

Tom Settersten, manager of the Combustion Chemistry and Diagnostics Department, chaired the biennial Laser Diagnostics in Combustion Gordon Research Conference, held August 11–16 in New Hampshire. Former CRF manager, Mark Linne (now director of the Combustion Engine Research Center at Chalmers University, Gothenburg, Sweden), who was vice-Chair for this meeting, will chair the next conference…

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Optimizing Engines for Alternative Fuels

by Magnus Sjöberg Given their potential to address issues related to limited petroleum reserves and accelerating global climate change, renewable fuels and improved engine efficiency are receiving significant research attention. Specifically, researchers are exploring the challenges of developing engines that can operate efficiently on alternative fuels, while offering high performance and low emissions. At Sandia’s…

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June Visitors

Jesse Quinlan 5/20/13–6/14/13 8351 Visiting Student Hosted by Joe Oefelein Jesse Quinlan, a graduate student at the University of Virginia (UV) who is also affiliated with NASA Langley Research Center, collaborated with researchers at the CRF over several weeks on a project to help develop combustion models applicable to the supersonic combustion processes typically encountered…

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Concentrating on Sunshine to Advance the Hydrogen Economy

Can solar energy be harnessed to address climate change and other impacts of the world’s dependence on carbon-based fuels? A Sandia team that includes principal investigator Tony McDaniel in the Hydrogen and Combustion Research Department and Ivan Ermanoski in the Materials, Devices, and Energy Technologies Department, has taken significant steps toward an intriguing possibility: creating…

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Fuel Cell Mobile Light Illuminates $2 Billion Highway Construction Project

The Fuel Cell Mobile Light has been field-tested in a number of interesting locations—highway shoulder work for Caltrans, airfield maintenance operations at San Francisco International Airport (SFO), at Hollywood awards ceremonies like the Academy Awards, Golden Globes, and Grammy’s, and at the final Space Shuttle launch in 2011. The Connecticut Department of Transportation (CT DOT)…

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CRF Visitors, April-May 2013

Berta Matas Güell, SINTEF Host: Chris Shaddix During a month-long stay at the CRF, Berta employed Sandia’s unique reactor facilities to study the high-temperature entrained flow gasification rates of coal and biomass particles. Findings will be used to model gasifier performance, an important step toward an approach for producing liquid transportation fuels. Berta is an…

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ExaCT holds all-hands meeting at CRF

On May 14, the Center for Exascale Simulation of Combustion in Turbulence (ExaCT) held its biannual all-hands meeting at the CRF. The meeting was attended by computer scientists, applied mathematicians and computational combustion scientists from ExaCT, and high-performance computing (HPC) vendors and computer scientists associated with DOE’s X-Stack program (aimed at developing programming environments for…

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CRF researchers attend 2013 SAE World Congress

Various CRF staff members attended the Society of Automotive Engineers (SAE) 2013 International Congress from April 16–18 in Detroit, Michigan. Each year this event draws over 10,000 people from 45 countries, representing original equipment manufacturers, suppliers, academia, research and development, and government. Chuck Mueller and Jacqueline O’Connor each received an SAE Engineering Meetings Board Outstanding…

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New Take on an Old Laser Diagnostic Opens Up Additional Avenues for Combustion Research

Coherent anti-Stokes Raman spectroscopy (CARS)—one of the most powerful gas-phase spectroscopic techniques—has been widely used and refined over the last 40 years in many fields of chemical physics, from chemical sensing and standoff detection of biowarfare agents to measuring molecular dynamics. CARS has also been applied to numerous combustion research tasks, such as detecting both…

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CRF Researchers Make Direct Kinetic Measurements of Criegee Intermediate

Researchers at Sandia National Laboratories’ Combustion Research Facility, the University of Manchester, Bristol University, University of Southampton, and Hong Kong Polytechnic have successfully measured reaction rates of a second Criegee intermediate, CH3CHOO, and proven that the reactivity of the atmospheric chemical depends strongly on which way the molecule is twisted. The measurements will provide further…

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Hope Michelsen’s induction into Alameda County Women’s Hall of Fame noted in EOS, Transactions

The April 9, 2013 issue of EOS, Transactions, American Geophysical Union (vol 94, number 15), noted climate researcher Hope Michelsen’s recent honor in being inducted into the Alameda County Women’s Hall of Fame in March. Hope was named the 2013 Outstanding Women in Science and is the first women from Sandia National Laboratories to receive…

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Chemical Kinetic Rate Coefficient Estimation Given Partial Information

Habib Najm, Khachik Sargsyan, and Bert Debusschere of the CRF, working with Cosmin Safta of Sandia’s Computer Sciences and Information Systems center and Robert Berry, formerly at the CRF and presently at The Climate Corporation in San Francisco, California, have demonstrated the use of a data free inference (DFI) approach [1] for uncertainty quantification (UQ)…

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How low-temperature combustion enables cleaner, more efficient engines

If you ask a long-haul trucker or a European car driver what pump they pull up to at the fuel station, the answer will most likely be “diesel.” These drivers choose diesel-fueled vehicles because diesel engines are more efficient than gasoline engines. When burning tens of thousands of gallons per year over long cross-country freight…

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CRF hosts Advisory Committee meeting

In January, Transportation Energy Center Director Bob Carling hosted a CRF Advisory Committee meeting. The two-day event featured research presentations on the Center for Infrastructure Research and Innovation, the Spray Combustion Consortium, measurement and modeling approaches to support climate mitigation, and diagnostics; visits to the Char Combustion lab, Advanced Imaging lab, and Alternative Fuel Direct-Injection…

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Sandia and Cool Earth Solar Announce Partnership

Under the bright California sun on Wednesday, Feb. 20, Sandia and Cool Earth Solar celebrated the announcement of a 5-year Cooperative Research and Development Agreement, the first public-private partnership to take full advantage of the Livermore Valley Open Campus (LVOC). “Today’s announcement perfectly embodies how the open campus will enable and foster collaboration,” said Division…

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Ahren Jasper and Nils Hansen lead combustion panel at AAAS

On Saturday, Feb. 16, CRF researchers Ahren Jasper and Nils Hansen organized a panel, Predictive Model of the Internal Combustion Engine, at the annual American Association for the Advancement of Science (AAAS) meeting. The panel brought together world leaders from new and ongoing multi-institutional programs designed to address the challenges of creating a fully predictive,…

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Hope Michelsen Named to Alameda County Women’s Hall of Fame

The Alameda County Women’s Hall of Fame has named Sandia combustion and atmospheric scientist Hope Michelsen (8353) as the 2013 Outstanding Woman in Science. She is the first Sandian to receive this award. Hope is being honored for her combustion and atmospheric science research—specifically, her contributions to developing methods of measuring soot, understanding how soot…

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Dave Chandler Elected as Vice-Chair of the American Physical Society’s Division of Chemical Physics

CRF senior scientist Dave Chandler has been elected vice-chair of the American Physical Society’s (APS) Division of Chemical Physics (DCP). The DCP’s mission is to provide a forum for those who work to understand a broad range of chemical systems, from atomic collisions to complex materials, in terms of the behavior of individual atoms and…

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Cellular Membrane Bending by Protein-Protein Crowding

Cellular membranes are made up of lipid bilayers that can be highly curved, an essential feature critical for processes such as endocytosis, organelle synthesis, cell division, and intracellular transport. Current understanding suggests that specialized proteins are responsible for membrane curvature through two mechanisms (Figure 1). The first is membrane scaffolding by proteins or complexes that…

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Measurements of Thermal Stratification in an HCCI Engine

Measurements of Thermal Stratification in an HCCI Engine As automotive and diesel engine companies strive to find more fuel efficient, environmentally friendly technologies, some have turned their attention to Homogenous Charge Compression Ignition (HCCI). HCCI engines use fuel mixed with a substantial amount of excess air or recirculated exhaust gas that is compressed in the…

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Sandia and OurEnergyPolicy.org release ‘Goals of Energy Policy’ poll results

US energy policy should simultaneously pursue security of its energy supply, economic stability, and reduced environmental impacts, says a national poll of energy professionals jointly prepared by Sandia and OurEnergyPolicy.org. The findings of the national poll, “The Goals of Energy Policy,” show that the vast majority — more than 85 percent — of the 884…

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Remembering Kevin Strecker

CRF researcher Kevin Strecker was a brilliant physicist with a child’s enthusiasm and curiosity for science, a giving mentor, and a person who cared deeply for others. On Nov. 4, he died of a heart attack at the age of 38. He is survived by his wife of 16 years, Michelle. “He was a once-in-a-career…

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CRF Researchers Awarded the David A. Shirley Award for Outstanding Scientific Achievement

The CRF is pleased to announce that researchers Craig Taatjes and David Osborn, along with collaborators at the University of Manchester and the University of Bristol, were awarded the 2012 David A. Shirley Award for Outstanding Scientific Achievement at LBNL’s Advanced Light Source (ALS). The award, which is named after a former Professor of Chemistry…

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Imane Khalil Joins the CRF Management Team

The CRF is proud to welcome Imane Khalil as the new manager of the Energy Systems Engineering and Analysis Department. Imane holds B.S., M.S., and Ph.D. degrees in Mechanical Engineering from the University of California at San Diego. She Joined Sandia Albuquerque in 2004 as a technical staff member where she developed code and conducted…

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Sandia analysis of fuel consumption trends in construction projects appears in the journal Energy Policy

Sandia researchers examined fuel use in construction projects and observed that estimates of fuel consumption in these projects are highly variable. Lack of standards for reporting at both the equipment and project levels make it difficult to quantify the magnitude of fuel consumption and the associated opportunities for efficiency improvements in construction projects. The study…

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Sandia experts lead technical investigation of hydrogen release incident

Hydrogen experts at Sandia/California were tapped for their technical expertise through a first-ever contract with the state of California to investigate a May 4 hydrogen release at the Bay Area’s Alameda-Contra Costa Transit District (AC Transit) hydrogen fueling station in Emeryville, CA. Based on the outcome of that investigation, on July 25, AC Transit’s board…

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Working Toward Success: A Look at the Engine Combustion Network

American industrialist Henry Ford once said, “If everyone is moving forward together, then success will take care of itself.” Ford was no doubt speaking on the basis of his business expertise but some 150 years later, his ideas of success are still in motion at the Combustion Research Facility (CRF). In keeping with the concept…

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CRF Researcher on Organizing Committee for Turbulent (Non)Premixed Flames Workshop

CRF researcher Rob Barlow served on the organizing committee for the Turbulent (Non)Premixed Flames (TNF) workshop, held in Darmstadt, Germany from July 26-28, 2012. The TNF workshop, which was hosted by the Technical University of Darmstadt, was attended by several CRF researchers and focused on experimental and computation work in the field of turbulent combustion.…

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CRF Researchers Serve As Co-Chair and Workshop Hosts at 34th International Combustion Symposium

CRF researcher Rob Barlow co-chaired the 34th International Combustion Symposium with Frederique Battin-Leclerc from CNRS, France and Kaoru Maruta from Tohoku University, Japan. The symposium, which was attended by a strong contingent of CRF staff, was held in Warsaw, Poland from July 29 through August 3, 2012 and is a leading meeting for the combustion community. Fellow…

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CRF Staff Presented Webinar on Material Characterization of Storage Vessels for Fuel Cell Forklifts

CRF manager Daniel Dedrick and researcher Chris San Marchi presented the results of a study conducted by Sandia National Laboratories on the fatigue life of steel pressure vessels, commonly used for the transport of pressurized gases, including gaseous hydrogen. Sandia analyzed the life-cycle performance of these vessels and created new design rules for hydrogen service,…

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CRF Research Presented at Workshop on Advanced Computing for Energy Innovation

Work conducted by CRF researcher Jackie Chen and her collaborators Ramanan Sankaran (Oak Ridge National Laboratory), Ray Grout (National Renewable Energy Laboratory), and John Levesque (Cray Supercomputing Center for Excellence) was presented at the DOE-sponsored Workshop on the Grand Challenges of Advanced Computing for Energy Innovation, held from July 31-August 2, 2012.  The invited talk,…

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Sandia analysis of tradeoffs across light-duty vehicle fleet power trains, fuels, and energy sources appears in the journal Energy Policy

Sandia researchers conducted a parametric analysis to examine the supply demand interactions between the US light-duty vehicle (LDV) fleet, its fuels, and the corresponding primary energy sources through 2050. The analysis emphasizes competition between conventional internal combustion engine (ICE) vehicles, including hybrids, and electric vehicles (EVs), represented by both plug-in hybrid and battery electric vehicles. The…

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CRF manager Daniel Dedrick receives DOE award for outstanding technical contribution

Each year, at the Department of Energy’s Annual Merit Review and Peer Evaluation Meeting, the Hydrogen and Fuel Cells Program presents “Program Awards” for contributions to the overall efforts of the Program, and “Sub-Program Awards” to recognize achievements in specific areas. CRF manager Daniel Dedrick received a Sub-Program Award for outstanding technical contribution in Hydrogen Safety,…

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Leaner Lifted-Flame Combustion: An ideal companion for biofuels

When Aristotle said that the whole is greater than the sum of its parts, he probably wasn’t thinking of engines and biofuels. But his famous quote applies perfectly to the synergy between Leaner Lifted-Flame Combustion (LLFC) and oxygenated biofuels. Each technology has its own limitations, but combining the two may create something much greater –…

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Sandia/CA receives joint awards with LLNL for environmental stewardship

This summer, the National Nuclear Security Administration (NNSA) announced the Pollution Prevention (P2) awards, given to national laboratories and sites for innovative efforts in environmental stewardship. Sandia/CA received recognition for two of our efforts that were conducted jointly with Lawrence Livermore National Laboratory (LLNL). The first award went to the Fresh @ the Labs project,…

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New work by CRF researchers chosen as a “HOT” paper in the journal Physical Chemistry Chemical Physics

The oxygen atom is a critical oxidizer of hydrocarbons in high temperature combustion.  Combustion models need to predict the products of these reactions accurately. Unlike other oxidizers, when O atoms react with hydrocarbons it is difficult to predict the products because of the effects of electron spin. New research that simultaneously measures multiple products of…

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Supercomputing In the Media: National Geographic

Kudos to Sandian Dr. Jackie Chen, whose work on exascale computing systems was recently featured in the National Geographic’s ‘Daily News’ section. Entitled “Supercomputing Power Could Pave the Way to Energy-Efficient Engines,” the news article focused on how the world’s most powerful supercomputers provide critical knowledge to spur the design of more fuel-efficient cars.  

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Sandia Hosts Friends and Family Day

Last month, Sandia/California vice president Rick Stulen hosted a Family and Friends Day so that researchers could share their work and achievements with those close to them. Over 1,100 visitors participated. Several CRF staff members were on hand to greet them, including researcher Mark Musculus, who kindly toured visitors through our labs.

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CRF manager hosts workshop on hydrogen safety

CRF manager Daniel Dedrick hosted an H2CAN Workshop on Hydrogen Safety in R&D from April 11-12. H2CAN, also known as the Natural Sciences and Engineering Research Council of Canada (NSERC) Hydrogen Canada Strategic Network, consists of international researchers interested in Hydrogen Production and Purification, Storage, and Infrastructure and Safety. Thirteen members attended the CRF workshop,…

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Sandia debuts the Livermore Valley Open Campus website

Through an exciting partnership between two Department of Energy national laboratories, Sandia National Laboratories and Lawrence Livermore National Laboratory, the Livermore Valley Open Campus (LVOC) was recently established as a space for open, collaborative work in areas such as bioscience, cyber security, detection technologies, and hydrogen applications. The newly-opened LVOC is a 110-acre campus that brings academia and businesses together with…

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ExaCT offers “proxy apps”

This month, we debuted the new website for The Center for Exascale Simulation of Combustion in Turbulence (ExaCT). The ExaCT group is actively developing a number of “proxy apps” that represent key aspects of structured-grid adaptive PDE-based combustion simulations. A subset of these proxy apps are available to the public. For more information, please go…

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ExaCT offers "proxy apps"

This month, we debuted the new website for The Center for Exascale Simulation of Combustion in Turbulence (ExaCT). The ExaCT group is actively developing a number of “proxy apps” that represent key aspects of structured-grid adaptive PDE-based combustion simulations. A subset of these proxy apps are available to the public. For more information, please go…

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Lyle Pickett awarded SAE John Johnson Award

CRF researcher Lyle Pickett was recently awarded the 2011 SAE John Johnson Award for Outstanding Research in Diesel Engines. Lyle was recognized for his paper: “Relationship Between Diesel Fuel Spray Vapor Penetration/Dispersion and Local Fuel Mixture Fraction.” Co-authors on the paper were CRF researchers Dennis L. Siebers and Mark P.B. Musculus and collaborators Julien Manin,…

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ExaCT Website Debuts

Last month we talked about Exascale Computing and Sandian Dr. Jackie Chen’s collaborative grant with Dr. John Bell of Lawrence Berkeley National Laboratory to establish the Center for Exascale Simulation of Combustion in Turbulence (ExaCT). Our new ExaCT website is now live and full of detailed information on the people, the project, and more. Check…

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April 2012

On April 10-12, CRF manager Damian Rouson and senior technical staff member Karla Morris taught an intensive workshop on object-oriented programming (OOP) in Fortran 2003 at the University of California at Berkeley. OOP aims to increase a program’s maintainability in part by reducing cross-module data dependencies and to increase a program’s reusability in part by…

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March 2012

On March 6, the Director of the Transportation Energy Center, Bob Carling, spoke on opportunities and challenges in transportation energy at the Satellite Kick-off Symposium for I2CNER: The International Institute for Carbon-Neutral Energy Research. Held at the University of Illinois at Urbana-Champaign, the event lasted two days and featured speakers from national laboratories, academia, industry,…

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February 2012

Senior manager of the Livermore Valley Open Campus, Andy McIlroy, presented a poster at the Industry-National Laboratory Workshop on Materials for Energy held at Lawrence Berkeley National Laboratory from January 30-February 1. The poster, entitled “Clean and Efficient Combustion for Energy Security,” was featured in the session on Energy: grid, carbon capture/sequestration, and combustion. On February…

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CRF Researchers answer Alan Alda’s Flame Challenge

Last month, Alan Alda posed a challenge to scientists and researchers in Science magazine: Can you explain what a flame is in a way that 11-year-olds will understand?  Entries could take any shape–prose, poetry, videos, cartoons and more! CRF researchers Guilhem Lacaze, Judit Zador, and Jens Prager got together to answer the challenge with their…

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CRF Researchers answer Alan Alda's Flame Challenge

Last month, Alan Alda posed a challenge to scientists and researchers in Science magazine: Can you explain what a flame is in a way that 11-year-olds will understand?  Entries could take any shape–prose, poetry, videos, cartoons and more! CRF researchers Guilhem Lacaze, Judit Zador, and Jens Prager got together to answer the challenge with their…

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Reaching out to the community: The CRF hosts Industry Day

One of the key aspects of the CRF’s mission is to encourage collaborations between our researchers and the academic and corporate communities, especially to help our partners develop Sandia-based technologies into commercial products that bring value to the larger public. Recently, the CRF recently hosted its first ‘Industry Day,’ an event that brought together manufacturers,…

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Multi-disciplinary Research at Work: Combustion Exascale Co-Design Center Established

Combustion research has never been timelier; in an era when resources are limited, energy costs are rising, and environmental concerns demand consideration, top researchers must find new ways to maximize efficiency while minimizing costs. Combustion accounts for roughly 85% of the total energy used in the U.S.–developing technologies to improve combustion efficiency necessitates a deeper…

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January 2012

January 17 Transportation Energy Center Director, Bob Carling, conducted the CRF portion of the Leadership Livermore Annual Tour. Leadership Livermore is a program created by the Livermore Chamber of Commerce in partnership with the City of Livermore to bring different individuals and organizations together to get a “behind the scenes” look at the community. The…

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Sandia researchers, UK partners publish groundbreaking work on Criegee intermediates in Science magazine

In a breakthrough paper published in this week’s issue of Science magazine, researchers from Sandia’s Combustion Research Facility, the University of Manchester and Bristol University report direct           measurements of reactions of a gas-phase Criegee intermediate using photoionization mass spectrometry. To read further, and to see a video of the Sandia…

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Sandia transportation fuels expert advises CA state lawmakers on practical approaches to reach new energy goals

A transportation fuels expert from Sandia National Laboratories says policy makers should consider such practical issues as the number of gas stations selling ethanol and how long it takes to get new transportation technologies to market as they introduce aggressive federal and state energy policies. “Policymakers need to have ways to think about the evolution…

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November 2011

November 18, 2011 CRF manager Dennis Siebers hosted a visit with scientists Waldir Martignoni, Edimilson de Oliveira and Luiz Lopreato from Petrobras, a multinational energy corporation headquartered in Brazil. Traditionally an oil company, Petrobras is invested in developing environmentally friendly alternate energy sources. November 16, 2011 Hal Stillman, Director of Technology at the International Copper…

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Turbulent Jet Flame Database Generated for Sooty Fuels

The CRF has a long and distinguished history of performing laser diagnostic measurements in turbulent flames and documenting the processed data and corresponding boundary conditions in an online database accessible to modelers. Because of the desire for highly refined measurements of species concentrations and local temperature (using combined Rayleigh and Raman scattering), these measurements have…

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Student Interns Return to the CRF

The Summer Technical Student Internship Program at Sandia National Laboratories provides opportunities for undergraduate and graduate students majoring in science, math, engineering, and other technical fields to integrate their academic program with work-related experience during their summer break. The CRF offers students training and practical work experience in the operation of state-of-the-art equipment and instruments.…

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Future Physics Study Tour Welcomed

Each year, the Vereniging voor Technische Physica (VvTP), the student association for Applied Physics students at Delft University of Technology in the Netherlands, organizes an extended tour of top universities, high-technology multinationals and start-ups, and world-renowned research facilities. As part of this year’s tour, 29 undergraduate students and two professors visited the CRF on July…

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Sandia’s Summer Institute

Technology and Policy Tools for Energy in an Uncertain World On August 8, Sandia launched a new cross-discipline week-long research program for top graduate students from the nation’s premier universities. At the Sandia Summer Institute (SSI), twenty-one enthusiastic graduate students met to collaborate in small teams, working side-by-side with leading scientists from Sandia to solve…

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Government Officials Tour Sandia California

The On June 29, Gavin Newsom, Lieutenant Governor of California, visited Sandia to learn about current and emerging energy research at the site. Hosted by Vice President Rick Stulen, Newsom learned about Sandia’s advanced modeling and simulation capabilities, research into advanced engine design, cybersecurity work, and the site’s economic impact on the State of California.…

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Scrambling molecules with light

Isotopic labeling of chemical compounds is one of the most powerful techniques for understanding how chemical reactions proceed. Adding an extra neutron to an atom’s nucleus [changing hydrogen (H) into deuterium (D) for example] doesn’t usually change chemistry, but the extra mass of the heavier isotope allows scientists to track the position of this atomic…

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CRF Visitor Program News August 2011

Gaurav Bansal, post-doc with Jackie Chen Gaurav‘s research was supported by the Combustion Energy Frontier Research Center. He worked on direct numerical simulation (DNS) of homogeneous charge compression ignition combustion with di-methyl ether, an oxygenated fuel, DNS of pulsating flame instabilities, and isometric mapping to identify reduced parameterizations in combustion. Gaurav has accepted a position…

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CRF Visitor Program News May 2011

Darwin Arifin and Torrie Aston, visitors with Tony McDaniel Torrie and Darwin are part of an ongoing collaboration between the CRF and students from the University of Colorado, Boulder.   Brian Fisher, post-doc with Chuck Meuller Brian Fisher worked as a post-doctoral research fellow in the Alternative Fuels Optical Engine Laboratory with Chuck Mueller. Their…

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Of blackboards and computer screens: scientific programming in the 21st century

Since he was a college student, Damian Rouson has been fascinated by the intersection of science and computing. Computers have transformed scientific research, yet the fields still exist on separate planes. He takes on the challenge of rendering computer languages, so vital to scientific advancements, more expressive and easier to read in a new book…

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Figure 2. Schematic of the modeled, prototypical lignocellulosic biochemical ethanol plant utilizing separate enzymatic hydrolysis and fermentation steps.

Thermochemical integration key to improving the efficiency of bio-ethanol production

A recently concluded CRF study as revealed the important role of combustion in the efficient operation of cellulosic ethanol plants for producing  biofuels. Unlike ‘first-generation’ ethanol derived from the fermentation of sugar or starch sources (such as corn), future production of ethanol in the United States is expected (and indeed is federally mandated) to increasingly…

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Figure 1. Schematic of the optically accessible HCCI research engine.

Characterizing the development of thermal stratification in HCCI engines

Homogeneous charge compression ignition (HCCI) engines can deliver high efficiencies—comparable to a diesel engine or higher—and ultra-low NOx and particulate emissions. They also offer the potential for lower cost than diesel engines and do not require expensive diesel-emissions after treatment for a significantly lower overall package price. HCCI is therefore well suited for future transportation…

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