Large-Scale High-Frequency Electromagnetic Simulation Based on Domain Decomposition Type Parallel Finite Element Method

Abstract

This paper describes a large-scale electromagnetic field simulation based on the finite element method with the iterative domain decomposition method. It solves the stationary vector wave equation for high-frequency electromagnetic field analysis with the electric field as the unknown function. This solver uses the iterative domain decomposition method (IDDM) and its parallel distributed processing environment to perform detailed, fast, and efficient finite element analysis of large-scale electromagnetic field problems. The problem is that it takes a lot of elapsed time. In this research, we determine appropriate calculation conditions by finding a convergence criterion value by verifying the accuracy using a benchmark problem and then conducting a parameter study to change the size of the subdomain in IDDM for shortening the elapsed time. Calculation conditions appropriately are determined by exploring the subdomain size. In addition, we demonstrate the effectiveness of the analysis method by executing 100–200 million large-scale analyses under these calculation conditions.