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- Ryan G. McClarren, Thomas M. Evans, Robert B. Lowrie, Jeffery D. Densmore
- J. Comput. Physics
- 2008

- Jeffery D. Densmore, Kelly G. Thompson, Todd J. Urbatsch
- J. Comput. Physics
- 2012

- Jeffery D. Densmore, Todd J. Urbatsch, Thomas M. Evans, Michael W. Buksas
- J. Comput. Physics
- 2007

Discrete Diffusion Monte Carlo (DDMC) is a hybrid transport-diffusion method for Monte Carlo simulations in diffusive media. In DDMC, particles take discrete steps between spatial cells according to a discretized diffusion equation. Thus, DDMC produces accurate solutions while increasing the efficiency of the Monte Carlo calculation. In this paper, we… (More)

- Thomas M. Evans, Jeffery D. Densmore
- J. Comput. Physics
- 2007

- Jeffery D. Densmore
- J. Comput. Physics
- 2011

- Jeffery D. Densmore, James S. Warsa, Robert B. Lowrie, Jim E. Morel
- J. Comput. Physics
- 2009

The third method (ECIMC) treats the conduction explicitly and includes all of the conduction and coupling in the linearization of the transport equation. This is a good approximation when the conduction timescales are much longer than the radiation-transport timescales. We expect this to be the case for most problems because the conduction timescales are… (More)

Discrete Diffusion Monte Carlo (DDMC) is a technique for increasing the efficiency of Monte Carlo simulations in diffusive media. We present a new DDMC method for linear, steady-state, radiation transport on Adaptive Mesh Refinement (AMR) meshes in two-dimensional Cartesian geometry. We specifically examine the cases of (i) a regular mesh structure without… (More)

We perform an asymptotic analysis of spatial discretizations in Implicit Monte Carlo (IMC). We consider two asymptotic scalings: one that represents a time step that resolves the mean-free time, and one that corresponds to a fixed, optically large time step. We show that only the latter scaling results in a valid spatial discretization of the proper… (More)

Todd J. Urbatsch, Allan B. Wollaber, Kelly G. Thompson, Jeffery D. Densmore, Gabriel M. Rockefeller, CCS-2; Timothy M. Kelley, CCS-7 The Jayenne Project, which began in 1997, provides simulation capability for thermal radiative transfer in the X-ray regime for high-energy-density physics applications such as supernova explosions, inertial confinement… (More)