Journal
JOURNAL OF COMPUTATIONAL PHYSICS
Volume 350, Issue -, Pages 280-295Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcp.2017.08.015
Keywords
Cluster dynamics; Fokker-Planck equation; Langevin dynamics; Markov process; Stochastic simulations
Funding
- GENCI-(CINES/CCRT)computer centre [A0010906973]
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Deterministic simulations of the rate equations governing cluster dynamics in materials are limited by the number of equations to integrate. Stochastic simulations are limited by the high frequency of certain events. We propose a coupling method combining deterministic and stochastic approaches. It allows handling different time scale phenomena for cluster dynamics. This method, based on a splitting of the dynamics, is generic and we highlight two different hybrid deterministic/stochastic methods. These coupling schemes are highly parallelizable and specifically designed to treat large size cluster problems. The proof of concept is made on a simple model of vacancy clustering under thermal ageing. (C) 2017 Elsevier Inc. All rights reserved.
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