Actions for The Radiation Transport Conundrum in Radiation Hydrodynamics [electronic resource].

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The Radiation Transport Conundrum in Radiation Hydrodynamics [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2005.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
PDF-FILE: 35 ; SIZE: 0.1 MBYTES pages
Additional Creators
Lawrence Livermore National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The summary of this paper is: (1) The conundrum in the title is whether to treat radiation in the lab frame or the comoving frame in a radiation-hydrodynamic problem; (2) Several of the difficulties are associated with combining a somewhat relativistic treatment of radiation with a non-relativistic treatment of hydrodynamics; (3) The principal problem is a tradeoff between easily obtaining the correct diffusion limit and describing free-streaming radiation with the correct wave speed; (4) The computational problems of the comoving-frame formulation in more than one dimension, and the difficulty of obtaining both exact conservation and full u/c accuracy argue against this method; (5) As the interest in multi-D increases, as well as the power of computers, the lab-frame method is becoming more attractive; and (6) The Monte Carlo method combines the advantages of both lab-frame and comoving-frame approaches, its only disadvantage being cost.
Report Numbers
E 1.99:ucrl-conf-210717
ucrl-conf-210717
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Note
Published through SciTech Connect.
03/18/2005.
"ucrl-conf-210717"
Presented at: Astrophysical Fluid Dynamics, Los Angeles, CA (US), 04/04/2005--04/09/2005.
Castor, J I.
Funding Information
W-7405-ENG-48
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