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DE200415006856

Publication Date	2000
Personal Author	Gentile, N. A.
Page Count	28
Abstract	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.
Keywords	Monte Carlo method Advance particles Acceleration Time dependent Calculations Probabilities Discretization Diffusion equations Radiative transfer simulations Small mean free path
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Livermore National Lab., CA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200416

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

Implicit Monte Carlo Diffusion - An Acceleration Method for Monte Carlo Time Dependent Radiative Transfer Simulations.
DE200415006856

Publication Date	2000
Personal Author	Gentile, N. A.
Page Count	28
Abstract	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.
Keywords	Monte Carlo method Advance particles Acceleration Time dependent Calculations Probabilities Discretization Diffusion equations Radiative transfer simulations Small mean free path
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Livermore National Lab., CA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200416