A Transient Electrical-Thermal Co-Simulation Method with LTS for Multiscale Structures

TL;DR

This paper presents a novel efficient transient electrical-thermal co-simulation approach using FEM and DGTD with local time stepping for analyzing complex multiscale structures, demonstrating improved accuracy and efficiency.

Contribution

It introduces a co-simulation method combining FEM, DGTD, and local time stepping to better analyze multiscale structures with reduced computational overhead.

Findings

Accurately simulates electrical-thermal behavior of multiscale structures.

Demonstrates improved efficiency over traditional methods.

Validates approach with complex practical examples.

Abstract

In this article, an efficient transient electricalthermal co-simulation method based on the finite element method (FEM) and the discontinuous Galerkin time-domain (DGTD) method is developed for electrical-thermal coupling analysis of multiscale structures. Two Independent meshes are adopted by the steady electrical analysis and the transient thermal simulation to avoid redundant overhead. In order to enhance the feasibility and efficiency of solving multiscale and sophisticated structures, a local time stepping (LTS) technique coupled with an interpolation method is incorporated into the co-simulation method. Several numerical examples from simple structures to complex multiscale PDN structures are carried out to demonstrate the accuracy and efficiency of the proposed method by comparing with the COMSOL. Finally, two practical numerical examples are considered to confirm the performance of the proposed method for complex and multiscale structures.