Multiscale modeling of rapid granular flow with a hybrid discrete-continuum method

被引:24
作者
Chen, Xizhong [1 ,2 ]
Wang, Junwu [1 ]
Li, Jinghai [1 ]
机构
[1] Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
基金
中国国家自然科学基金;
关键词
Hybrid discrete-continuum method; Multiscale simulation; Discrete element model; Continuum model; Granular flow; BOUNDARY-CONDITIONS; FLUID-FLOW; DENSE; PARTICLES; BEDS; INSTABILITIES; HYDRODYNAMICS; SIMULATION; BEHAVIOR; 2-FLUID;
D O I
10.1016/j.powtec.2016.08.017
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Both discrete and continuum models have been widely used to study rapid granular flow, discrete model is accurate but computationally expensive, whereas continuum model is computationally efficient but its accuracy is doubtful in many situations. Here we propose a hybrid discrete-continuum method to profit from the merits but discard the drawbacks of both discrete and continuum models. Continuum model is used in the regions where it is valid and discrete model is used in the regions where continuum description fails, they are coupled via dynamical exchange of parameters in the overlap regions. Simulation of granular channel flow demonstrates that the proposed hybrid discrete-continuum method is nearly as accurate as discrete model, with much less computational cost. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码:177 / 185
页数:9
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