Highly parallel demagnetization field calculation using the fast multipole method on tetrahedral meshes with continuous sources

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:442

Article

Palmesi, P.¹  Exl, L.^2,3  Bruckner, F.¹  Abert, C.¹  Suess, D.¹ 

[1] TU Wien, Inst Solid State Phys, Christian Doppler Lab Adv Magnet Sensing & Mat, Vienna, Austria

[2] TU Wien, Inst Solid State Phys, Vienna, Austria

[3] Univ Vienna, Fac Math, Vienna, Austria

关键词: Micromagnetic;    Stray-field;    Fast multipole method;    High performance computing;   

DOI  :  10.1016/j.jmmm.2017.06.128

来源: Elsevier

【 摘 要 】

The long-range magnetic field is the most time-consuming part in micromagnetic simulations. Computational improvements can relieve problems related to this bottleneck. This work presents an efficient implementation of the Fast Multipole Method [FMM] for the magnetic scalar potential as used in micromagnetics. The novelty lies in extending FMM to linearly magnetized tetrahedral sources making it interesting also for other areas of computational physics. We treat the near field directly and in use (exact) numerical integration on the multipole expansion in the far field. This approach tackles important issues like the vectorial and continuous nature of the magnetic field. By using FMM the calculations scale linearly in time and memory. (C) 2017 The Authors. Published by Elsevier B.V.

【 授权许可】

Free