A hybrid FD-DEM solver for rigid particles in viscous fluid
Wu, Shifeng1,2,3; Yuan, Li2,3
Source PublicationCOMPUTERS & FLUIDS
AbstractIn this article, the dynamics of colliding particles immersed in a viscous fluid is numerically investigated. An improved fictitious domain (FD) method for a solid-fluid system is developed and a collision strategy for multiple particles is presented. In earlier methods, a repulsive force is applied to the particles when their separation distance is less than a critical value and depending on the magnitude of this artificial repulsive force, collision of two or more particles may bounce unrealistically. In the present method, when the collision of two or more particles happens, the collision force acting on each colliding particle is determined by using the Discrete Element Method (DEM). Furthermore, the improved FD method employs a discrete delta-function in the form of bi-function to transfer quantities between the Eulerian and Lagrangian nodes similar to the immersed boundary method. This feature avoids the need to use Lagrange multipliers for imposition of the rigid body motion. Numerical results for motions of one or several particles in a viscous fluid are presented. (C) 2015 Elsevier Ltd. All rights reserved.
KeywordCollision Particulate flow Repulsive force Fictitious domain method Discrete element method Discrete delta-function
Funding ProjectNatural Science Foundation of China[10972230] ; Natural Science Foundation of China[11021101] ; Natural Science Foundation of China[11261160486] ; state key program for developing basic sciences[2010CB731505] ; Department of Education of Guangdong Province[2014KQNCX175]
WOS Research AreaComputer Science ; Mechanics
WOS SubjectComputer Science, Interdisciplinary Applications ; Mechanics
WOS IDWOS:000359964100012
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Document Type期刊论文
Corresponding AuthorWu, Shifeng
Affiliation1.Guangdong Polytech Normal Univ, Dept Comp Sci, Guangzhou 510665, Guangdong, Peoples R China
2.Chinese Acad Sci, LSEC, Beijing 100080, Peoples R China
3.Chinese Acad Sci, Inst Computat Math, Acad Math & Syst Sci, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Wu, Shifeng,Yuan, Li. A hybrid FD-DEM solver for rigid particles in viscous fluid[J]. COMPUTERS & FLUIDS,2015,118:159-166.
APA Wu, Shifeng,&Yuan, Li.(2015).A hybrid FD-DEM solver for rigid particles in viscous fluid.COMPUTERS & FLUIDS,118,159-166.
MLA Wu, Shifeng,et al."A hybrid FD-DEM solver for rigid particles in viscous fluid".COMPUTERS & FLUIDS 118(2015):159-166.
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