A damping boundary condition for atomistic-continuum coupling

doi:10.1088/1674-1056/26/6/068702

Abstract The minimization of spurious wave reflection is a challenge in multiscale coupling due to the difference of spatial resolution between atomistic and continuum regions. In this study, a new damping condition is presented for eliminating spurious wave reflection at the interface between atomistic and continuum regions. This damping method starts by a coarse-fine decomposition of the atomic velocity based on the bridging scale method. The fine scale velocity of the atoms in the damping region is reduced by applying nonlinear damping coefficients. The effectiveness of this damping method is verified by one-and two-dimensional simulations.

Keywords: multiscale modeling spurious wave reflection coarse-fine decomposition nonlinear damping

Received: 25 November 2016
Revised: 04 February 2017
Accepted manuscript online:

PACS:	87.15.ap	(Molecular dynamics simulation)
	46.15.-x	(Computational methods in continuum mechanics)
	46.40.Ff	(Resonance, damping, and dynamic stability)

Corresponding Authors: Kiet Tieu
E-mail: ktieu@uow.edu.au

Cite this article:

Jie Zhang(张杰), Kiet Tieu, Guillaume Michal, Hongtao Zhu(朱洪涛), Liang Zhang(张亮), Lihong Su(苏利红), Guanyu Deng(邓关宇), Hui Wang(王辉) A damping boundary condition for atomistic-continuum coupling 2017 Chin. Phys. B 26 068702

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A damping boundary condition for atomistic-continuum coupling

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