Implicit Monte Carlo Diffusion - An Acceleration Method for Monte Carlo Time Dependent Radiative Transfer Simulations.

Gentile, N. A.

Technical Information Center Oak Ridge Tennessee

关键词: Monte Carlo method;    Advance particles;    Acceleration;    Time dependent;    Calculations;   

RP-ID  :  DE200415006856

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

We present a method for accelerating time dependent Monte Carlo radiative transfer calculations by using a discretization of the diffusion equation to calculate probabilities that are used to advance particles in regions with small mean free path. The method is demonstrated on problems with on 1 and 2 dimensional orthogonal grids. It results in decreases in run time of more than an order of magnitude on these problems, while producing answers with accuracy comparable to pure IMC simulations. We call the method Implicit Monte Carlo Diffusion, which we abbreviate IMD.