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Tsinghua Science and Technology

Keywords

Kinetic Monte Carlo (KMC), communication optimization, parallel computation, Message Passing Interface (MPI)

Abstract

Kinetic Monte Carlo (KMC) is a widely used method for studying the evolution of materials at themicrocosmic level. At present, while there are many simulation software programs based on this algorithm, most focus on the verification of a certain phenomenon and have no analog-scale requirement, so many are serial in nature. The dynamic Monte Carlo algorithm is implemented using a parallel framework called SPPARKS, but it does not support the Embedded Atom Method (EAM) potential, which is commonly used in the dynamic simulation of metal materials. Metal material — the preferred material for most containers and components — plays an important role in many fields, including construction engineering and transportation. In this paper, we propose and describe the development of a parallel software program called Crystal-KMC, which is specifically used to simulate the lattice dynamics of metallic materials. This software uses MPI to achieve a parallel multiprocessing mode, which avoid the limitations of serial software in the analog scale. Finally, we describe the use of the parallel-KMC simulation software Crystal-KMC in simulating the diffusion of vacancies in iron, and analyze the experimental results. In addition, we tested the performance of Crystal-KMC in “meta -Era” supercomputing clusters, and the results show the Crystal-KMC parallel software to have good parallel speedup and scalability.

Publisher

Tsinghua University Press

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