Energy and Climate

Research & Capabilities

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

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 Combustion Research Facility (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 […]

Sandia’s Exascale Computing Effort Expected to Curtail Effects of System Faults

Computing power today is more potent than ever before. Or is it? In many applications, yes, but when it comes to sophisticated, detailed modeling of the Earth’s climate, an analogy of using an abacus to track the national debt may be only a slight exaggeration. “To accurately predict the Earth’s climate over the next 200–300 […]

New Conceptual Insights into Diesel Engine Fuel-Injection Processes

By combining advanced theory and high-fidelity large eddy simulation, Combustion Research Facility (CRF) researchers Rainer Dahms and Joe Oefelein (both in 8351) have provided new conceptual insights that promise to improve the understanding and prediction of fuel-injection processes in high-pressure diesel engine conditions. Their results, which experiments performed by CRF researchers Lyle Pickett and Julien […]

DOE Office of Electricity Delivery & Energy Reliability (OE) Energy Storage Safety Workshop

On February 17–18, 2014, Sandia National Laboratories and Pacific Northwest National Laboratory co-hosted the DOE OE Energy Storage Safety Workshop in Albuquerque, NM. This workshop’s goal was to address the need for validated energy-storage safety as identified in the DOE strategic plan for “Grid Energy Storage.” Thought leaders in the fields of deployment, operation, regulation, […]

Fusion Instabilities Lessened by Unexpected Effect

In recent Z Machine experiments, two Helmholz coils unexpectedly altered and slowed the growth of the magneto Rayleigh-Taylor (RT) instabilities, a plasma distortion that usually spins quickly out of control and has sunk past efforts to achieve controlled fusion. Radiographs of the process showed that the Helmholz coils’ field altered and slowed magneto-RT instability growth, […]

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