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Coupling Strategies Investigation of Hybrid Atomistic-Continuum Method Based on State Variable Coupling
Joint Authors
Ren, Xiao-Guang
Xu, Xin-Hai
Yang, Xue-Jun
Ji, Hongyu
Wang, Qian
Li, Chao
Source
Advances in Materials Science and Engineering
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-21, 21 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-02-14
Country of Publication
Egypt
No. of Pages
21
Abstract EN
Different configurations of coupling strategies influence greatly the accuracy and convergence of the simulation results in the hybrid atomistic-continuum method.
This study aims to quantitatively investigate this effect and offer the guidance on how to choose the proper configuration of coupling strategies in the hybrid atomistic-continuum method.
We first propose a hybrid molecular dynamics- (MD-) continuum solver in LAMMPS and OpenFOAM that exchanges state variables between the atomistic region and the continuum region and evaluate different configurations of coupling strategies using the sudden start Couette flow, aiming to find the preferable configuration that delivers better accuracy and efficiency.
The major findings are as follows: (1) the C→A region plays the most important role in the overlap region and the “4-layer-1” combination achieves the best precision with a fixed width of the overlap region; (2) the data exchanging operation only needs a few sampling points closer to the occasions of interactions and decreasing the coupling exchange operations can reduce the computational load with acceptable errors; (3) the nonperiodic boundary force model with a smoothing parameter of 0.1 and a finer parameter of 20 can not only achieve the minimum disturbance near the MD-continuum interface but also keep the simulation precision.
American Psychological Association (APA)
Wang, Qian& Ren, Xiao-Guang& Xu, Xin-Hai& Li, Chao& Ji, Hongyu& Yang, Xue-Jun. 2017. Coupling Strategies Investigation of Hybrid Atomistic-Continuum Method Based on State Variable Coupling. Advances in Materials Science and Engineering،Vol. 2017, no. 2017, pp.1-21.
https://search.emarefa.net/detail/BIM-1123494
Modern Language Association (MLA)
Wang, Qian…[et al.]. Coupling Strategies Investigation of Hybrid Atomistic-Continuum Method Based on State Variable Coupling. Advances in Materials Science and Engineering No. 2017 (2017), pp.1-21.
https://search.emarefa.net/detail/BIM-1123494
American Medical Association (AMA)
Wang, Qian& Ren, Xiao-Guang& Xu, Xin-Hai& Li, Chao& Ji, Hongyu& Yang, Xue-Jun. Coupling Strategies Investigation of Hybrid Atomistic-Continuum Method Based on State Variable Coupling. Advances in Materials Science and Engineering. 2017. Vol. 2017, no. 2017, pp.1-21.
https://search.emarefa.net/detail/BIM-1123494
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1123494