Computational electromagnetics, computational electrodynamics or electromagnetic modeling is the process of modeling the interaction of electromagnetic fields with physical objects and the environment.
It typically involves using computationally efficient approximations to Maxwell's equations and is used to calculate antenna performance, electromagnetic compatibility, radar cross section and electromagnetic wave propagation when not in free space.
A specific part of computational electromagnetics deals with electromagnetic radiation scattered and absorbed by small particles.
Read more about Computational Electromagnetics: Background, Overview of Methods, Choice of Methods, Maxwell's Equations in Hyperbolic PDE Form, Validation