A damping boundary condition for atomistic-continuum coupling

Authors

Jie Zhang, University of WollongongFollow
Anh Kiet Tieu, University of WollongongFollow
Guillaume Michal, University of WollongongFollow
Hongtao Zhu, University of WollongongFollow
Liang Zhang, University of WollongongFollow
Lihong Su, University of WollongongFollow
Guanyu Deng, University of WollongongFollow
Hui Wang, University of WollongongFollow

RIS ID

115024

Publication Details

Zhang, J., Tieu, K., Michal, G., Zhu, H., Zhang, L., Su, L., Deng, G. & Wang, H. (2017). A damping boundary condition for atomistic-continuum coupling. Chinese Physics B, 26 (6), 068702-1-068702-8.

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 coarsefine 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.