Application of the Born Approximation for Modeling EM Effects of Moving Materials in COMSOL Multiphysics

In this paper, we present the application of Born approximations for solving problems related to the influence of moving materials on the scattered electromagnetic field within a commercial CAD environment. The study focuses on non-relativistic velocities, which are of significant practical relevance. The integration of the methodology into COMSOL was straightforward and gave significant results. We provide the general formulation of the problem of interest, discuss the relevant electrodynamic conditions, and introduce the Born approximation under these assumptions. A detailed description of the developed procedure workflow is given. The approach is verified through a comparison between simulation results and semi-analytical solutions. The key aspect of this work is that the integration of Born approximations into commercial software offers a powerful and efficient tool for solving electrodynamics problems involving media in motion, especially those with strong practical significance. This is supported by an example of application of the methodology to a case of practical relevance.