Convergence of highly parallel stray field calculation using the fast multipole method on irregular meshes

作者：Palmesi P^*; Abert C; Bruckner F; Suess D

来源：AIP Advances, 2018, 8(5): 056019.

DOI：10.1063/1.5006896

Fast stray field calculation is commonly considered of great importance for micro-magnetic simulations, since it is the most time consuming part of the simulation. The Fast Multipole Method (FMM) has displayed linear O(N) parallelization behavior on many cores. This article investigates the error of a recent FMM approach approximating sources using linear-instead of constant-finite elements in the singular integral for calculating the stray field and the corresponding potential. After measuring performance in an earlier manuscript, this manuscript investigates the convergence of the relative L-2 error for several FMM simulation parameters. Various scenarios either calculating the stray field directly or via potential are discussed.

• 出版日期2018-5