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Womble, David E.

Unified collision operator demonstrated for both radiation transport and PIC-DSMC. A side-by-side comparison between the DSMC method and the radiation transport method was conducted for photon attenuation in the atmosphere over 2 kilometers in physical distance with a reduction of photon density of six orders of magnitude. Both DSMC and traditional radiation transport agreed with theory to two digits. This indicates that PIC-DSMC operators can be unified with the radiation transport collision operators into a single code base and that physics kernels can remain unique to the actual collision pairs. This simulation example provides an initial validation of the unified collision theory approach that will later be implemented into EMPIRE.

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TYPE Other Report YEAR 2016
DOIOSTI

A2e High Fidelity Modeling: Strategic Planning Meetings

Womble, David E.; Barone, Matthew F.; Hammond, Steven W.; Sprague, Michael A.

Atmosphere to electrons (A2e) is a multi-year U.S. Department of Energy (DOE) research initiative targeting significant reductions in the cost of wind energy through an improved understanding of the complex physics governing wind flow into and through whole wind farms. Better insight into the flow physics of large multi-turbine arrays will address the plant-level energy losses, is likely to reduce annual operational costs by hundreds of millions of dollars, and will improve project financing terms to more closely resemble traditional capital projects. In support of this initiative, two planning meetings were convened, bringing together professionals from universities, national laboratories, and industry to discuss wind plant modeling challenges, requirements, best practices, and priorities. This report documents the combined work of the two meetings and serves as a key part of the foundation for the A2e/HFM effort for predictive modeling of whole wind plant physics.

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TYPE SAND Report YEAR 2015
DOIOSTI

Computer Science Research Institute 2002 Annual Report of Activities

Womble, David E.; Womble, David E.; Delap, Barbara J.; Ceballos, Deanna R.

This report summarizes the activities of the Computer Science Research Institute (CSRI) at Sandia National Laboratories during the period January 1, 2002 to December 31, 2002. During this period the CSRI hosted 172 visitors representing 95 universities, companies or laboratories. Of these 56 were summer students or faculty. The CSRI also organized and hosted five workshops with 171 participants. Of these 94 attendees were from 64 universities, companies or laboratories, and 77 were from Sandia. Finally, the CSRI sponsored 14 long-term collaborative research projects.

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TYPE Report YEAR 2003
OSTIDOI
Results 1–25 of 35
Results 1–25 of 35