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Old   April 27, 2006, 09:56
Default Surface Radiation - parallel computing
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Sile
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Hi, I am looking for some help regarding non-convex radiation computing. I have heard that there are some issues running these models on parallel processors but I can't find any information on it! I'm very new to the field so any help at all would be much appreciated. Many thanks, Sile
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Old   April 30, 2006, 03:08
Default Re: Surface Radiation - parallel computing
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Rami
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Sile,

It very much depends on your solution method.

For ray-trace (Monte-Carlo or DTM) parallelization is trivial, since each ray is independent of other rays. Consequently we reached nearly 100% parallel efficiency with 16 CPUs (Cray and SGI Origin).

With DOM, FVM etc., the parallel efficiency depends a lot on your base method and the parallelization method. Please see our paper (and references therein)

J. Tal, R. Ben-Zvi, A. Kribus, A High-Efficiency Parallel Solution of the Radiative Transfer Equation, Numerical Heat Transfer, Part B, Vol. 44 No. 3, pp. 295-308, 2003.

BTW: 1. What do you mean by "non-convex radiation computing"? 2. Are you considering inter-surface radiation or radiation in participating medium?
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Old   May 2, 2006, 03:48
Default Re: Surface Radiation - parallel computing
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Sile
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Rami,

Thank you very much for your reply - it is much appreciated. I'll check out that reference.

I am considering inter-surface radiation. The term non-convex was used in the project description I was given. My understanding of it in the context of the project(although I may be wrong) is that it refers to inter-surface radiation on concave surfaces, i.e. non-flat or convex surfaces. Thanks again! Sile
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