Multi-group radiation diffusion convergence in low-density foam experiments

We present an in-depth analysis of a Marshak radiation wave moving through an iron-oxide (Fe2O3) foam using a 1D multigroup diffusive radiation transport model, MDART (Multigroup Diffusion Algorithm for Radiation Transport). We consider the consequences of under-resolving the group structure and address how this could lead to incorrect conclusions in the analysis of general supersonic radiation wave experiments. We also provide an analysis of the types of experimental outcome one may incorrectly link to physical effects but are in fact due to poor simulation practice. Crown Copyright (C) 2022 Published by Elsevier Ltd. All rights reserved.

Automated summary

The present study provides a comprehensive analysis of a Marshak radiation wave moving through an iron-oxide foam using the MDART model. It reveals that under-resolving the group structure can lead to erroneous conclusions in the analysis of supersonic radiation wave experiments, and highlights the possibility of incorrectly attributing certain experimental outcomes to physical effects due to poor simulation practice.