Second order time evolution of the multigroup diffusion and P-1 equations for radiation transport
An existing solution method for solving the multigroup radiation equations, linear II frequency-grey acceleration, is here extended to be second order in time. This me works for simple diffusion and for flux-limited diffusion, with or without material con tion. A new method is developed that does not require the solution of an averaged transport equation. It is effective solving both the diffusion and P-1 forms of the tram equation. Two dimensional, multi-material test problems are used to compare the soli methods. (C) 2011 Elsevier Inc. All rights reserved.
second order multigroup radiation transport flux-limited diffusion radiation diffusion