Multigroup Implicit Monte Carlo Radiation Hydrodynamics on Moving Voronoi Meshes with STORM and RICH
Abstract
We present and validate an Implicit Monte Carlo (IMC) radiation-transport solver in the open-source, mesh-agnostic storm library, coupled to the moving-mesh hydrodynamics code rich in three-dimensional Voronoi tessellations. The solver is multigroup, or continuous in frequency, throughout; it transforms photon packets exactly between the comoving and laboratory frames, books every exchange with the material as a laboratory four-momentum so that the IMC path conserves energy to roundoff, formulates the Fleck factor in the fluid's proper time, and accelerates optically thick cells with multigroup Discrete Diffusion Monte Carlo (DDMC) behind an emissivity-preserving interface. We tested the solver on a broad suite of benchmark problems, and it performed well on all of them. The solver is built on the MPI-parallel Monte Carlo framework of storm, which scales to 13,440 cores.
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BibTeX
@misc{mizrachi2026multigroup,
title = {{Multigroup Implicit Monte Carlo Radiation Hydrodynamics on Moving Voronoi Meshes with STORM and RICH}},
author = {Maor Mizrachi and Barak Raveh and Elad Steinberg},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.25174},
eprint = {2610.25174},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.25174},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Multigroup Implicit Monte Carlo Radiation Hydrodynamics on Moving Voronoi Meshes with STORM and RICH
AU - Maor Mizrachi
AU - Barak Raveh
AU - Elad Steinberg
PY - 2026
DA - 2026/10/18
PB - arXiv
DO - 10.48550/arxiv.2610.25174
UR - https://arxiv.org/abs/2610.25174
AB - We present and validate an Implicit Monte Carlo (IMC) radiation-transport solver in the open-source, mesh-agnostic storm library, coupled to the moving-mesh hydrodynamics code rich in three-dimensional Voronoi tessellations. The solver is multigroup, or continuous in frequency, throughout; it transforms photon packets exactly between the comoving and laboratory frames, books every exchange with the material as a laboratory four-momentum so that the IMC path conserves energy to roundoff, formulates the Fleck factor in the fluid's proper time, and accelerates optically thick cells with multigroup Discrete Diffusion Monte Carlo (DDMC) behind an emissivity-preserving interface. We tested the solver on a broad suite of benchmark problems, and it performed well on all of them. The solver is built on the MPI-parallel Monte Carlo framework of storm, which scales to 13,440 cores.
ER -