Multi-phase field model simulation based on MPI+OpenMP parallel: Evolution of seaweed and dendritic structure in directional solidification

doi:10.1063/5.0084012

	Multi-phase field model simulation based on MPI+OpenMP parallel: Evolution of seaweed and dendritic structure in directional solidification
	Gao, Zihao 1; Zhu, Changsheng 1,2; Qi, Meiling 3; Wang, Canglong 3; Wang, Yinlong 3,4; Zhao, Borui 1
刊名	AIP Advances
	2022-03-01
卷号	12 期号:3
关键词	Anisotropy Application programming interfaces (API) Computational efficiency Crystal structure Efficiency Grain boundaries Isotherms Parallel programming Seaweed Software testing Solidification Thermal gradients Bi-crystals Dendrite arms Dendritic grains Dendritic structures Hybrid parallel programming Message-passing Modeling simulation Multi-phase-field model Multiphase modeling Pulling velocity
DOI	10.1063/5.0084012
英文摘要	A multi-phase model was established to imitate the growth of algal and dendritic grains during directional solidification. We studied the effects of temperature on the growth of bi-crystals and quantitatively analyzed the influence of anisotropic strength, thermal gradient, and pulling velocity on the evolution of bi-crystals. The results show that both weaker anisotropy strength and smaller pulling velocity can maintain the formation of seaweed tissue. The increase in the pulling velocity can degenerate the seaweed grains into dendrites and improve the growth rate of the dendrites, which make grain B produce more spindles, thereby accelerating the elimination of grain A. The thermal gradient is inversely proportional to the average initial spacing of dendrites. When the thermal gradient is too small, dendritic dendrites produce developed secondary dendrite arms, which, in turn, develop into tertiary dendrite arms to occupy the grain boundary, accelerating the elimination of seaweed grains. In addition, the multi-phase field model is solved by using central processing unit serial computation, single MPI (message passing interface) parallel programming method calculation, and MPI+OpenMP hybrid parallel programming structure, and the relevant factors affecting the efficiency of program operation are analyzed and tested. By comparing the computational efficiency of the three methods, it can be seen that the MPI+OpenMP hybrid parallel programming technology can make full use of computing resources in the case of large computing scale, further optimize the MPI parallel model, and obtain a higher acceleration ratio. © 2022 Author(s).
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	American Institute of Physics Inc.
WOS记录号	WOS:000770580400007
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/157906]
专题	计算机与通信学院
作者单位	1.School of Computer and Communication, Lanzhou University of Technology, Lanzhou; 730050, China; 2.State Key Laboratory of Gansu Advanced Processing and Recycling of Non-Ferrous Metal, Lanzhou; 730050, China; 3.Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou; 730000, China; 4.School of Nuclear Science and Technology, Lanzhou University, Lanzhou; 730000, China
推荐引用方式 GB/T 7714	Gao, Zihao,Zhu, Changsheng,Qi, Meiling,et al. Multi-phase field model simulation based on MPI+OpenMP parallel: Evolution of seaweed and dendritic structure in directional solidification[J]. AIP Advances,2022,12(3).
APA	Gao, Zihao,Zhu, Changsheng,Qi, Meiling,Wang, Canglong,Wang, Yinlong,&Zhao, Borui.(2022).Multi-phase field model simulation based on MPI+OpenMP parallel: Evolution of seaweed and dendritic structure in directional solidification.AIP Advances,12(3).
MLA	Gao, Zihao,et al."Multi-phase field model simulation based on MPI+OpenMP parallel: Evolution of seaweed and dendritic structure in directional solidification".AIP Advances 12.3(2022).