Large-scale micromagnetics simulations with dipolar interaction using all-to-all communications
Large-scale micromagnetics simulations with dipolar interaction using all-to-all communications
复制标题
使用全对全通信进行偶极相互作用的大规模微磁学模拟
DOI：
10.1063/1.4944338
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
K. Ono
中科院分区：
文献类型：
--
作者：
H. Tsukahara;S.;K. Iwano;N. Inami;T. Ishikawa;C. Mitsumata;H. Yanagihara;E. Kita;K. Ono
我们在微磁学模拟器上实现了低复杂度并行快速傅里叶变换算法，这将所有对所有通信的频率从六倍降低到两倍。微磁学模拟的几乎所有计算时间都被静磁场的计算所占据，而静磁场的计算可以使用快速傅里叶变换方法来计算。结果表明，即使使用8192个物理核进行微磁学仿真，仿真时间也减少了，并且具有良好的可扩展性。这种高度并行化效应使得能够执行超过十亿次的大规模微磁学模拟。由于需要大规模并行计算来模拟由许多微米级颗粒组成的真实永磁体的磁化动力学，因此我们的模拟器有望揭示磁化动力学如何影响永磁体的矫顽力。
We implement on our micromagnetics simulator low-complexity parallel fast-Fourier-transform algorithms, which reduces the frequency of all-to-all communications from six to two times. Almost all the computation time of micromagnetics simulation is taken up by the calculation of the magnetostatic field which can be calculated using the fast Fourier transform method. The results show that the simulation time is decreased with good scalability, even if the micromagentics simulation is performed using 8192 physical cores. This high parallelization effect enables large-scale micromagentics simulation using over one billion to be performed. Because massively parallel computing is needed to simulate the magnetization dynamics of real permanent magnets composed of many micron-sized grains, it is expected that our simulator reveals how magnetization dynamics influences the coercivity of the permanent magnet.
固体磁化颗粒随机磁各向异性的数值模拟
影响因子：
2.7
作者：
S.J.Lee;Suguru Sato;Chiharu Mitsumata;Hideto Yanagihara;Eiji Kita
通讯作者：
Eiji Kita