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- W1999188088 abstract "We derive a 3D multi-band moment model and its associated closure for radiation and neutron transfer. The new closure is analytical and nonlinear but very simple. Its derivation is based on the maximum entropy closure and assumes a Wien shape for the intensity when used in the Eddington tensor. In the multi-band approach, the opacity is re-arranged (binned) according to the opacity value. The multi-band model propagates identically all photons/neutrons having the same opacity. This has been found to be a good approximation on average since the transport is mostly determined by the opacities and less by the frequencies. This same concept is used to derive the closure. We prove on two complex test atmospheres (the solar atmosphere and an artificial atmosphere) that the closure we have derived has good accuracy. All approximations made in deriving the model have been carefully numerically checked and quantified." @default.
- W1999188088 created "2016-06-24" @default.
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- W1999188088 date "2008-02-01" @default.
- W1999188088 modified "2023-09-24" @default.
- W1999188088 title "A 3-D multiband closure for radiation and neutron transfer moment models" @default.
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- W1999188088 doi "https://doi.org/10.1016/j.jcp.2007.08.028" @default.
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