TIME DECOMPOSITION METHOD FOR THE GENERAL TRANSIENT SIMULATION OF LOW-FREQUENCY ELECTROMAGNETICS

Bo He, Chuan Lu, Ningning Chen, Dingsheng Lin, Marius Rosu, Ping Zhou
2017 Electromagnetic Waves  
This paper describes a highly robust and efficient parallel computing method for the transient simulation of low-frequency electromagnetics with nonlinear materials and/or permanent magnets. In this method, time subdivisions are introduced to control the memory usage and nonlinear convergence. A direct block triangular matrix solver is applied to solve the formulated block matrix for each subdivision. This method has been implemented using the Message Passing Interface (MPI) for distributed
more » ... for distributed memory parallel processing. Depending on the number of available MPI processes and physical memory, the entire nonlinear transient simulation can be divided into several subdivisions along the time-axis such that each MPI process handles only the computation for one time-step. Application examples are presented to demonstrate that this method can achieve excellent scalability of speedup.
doi:10.2528/pier17072501 fatcat:jeouchcvyzcqxmnr6gyhxvg7gy