A damping boundary condition for atomistic-continuum coupling

作     者：张杰 Kiet Tieu Guillaume Michal 朱洪涛 张亮 苏利红 邓关宇 王辉 

作者机构：School of MechanicalMaterialsand Mechatronic EngineeringUniversity of Wollongong Department of Materials Science and EngineeringKyoto University 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2017年第26卷第6期

页      面：508-515页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：the financially support from the Japan Society for the promotion of Science (JSPS) for his fellowship 

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

摘      要：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.