IMECH-IR  > 非线性力学国家重点实验室
EFFICIENT COEFFICIENT OF RESTITUTION AND LATTICE-BOLTZMANN SIMULATION OF GRAVITATIONAL SETTLING AND REBOUND IN A VISCOUS FLUID
Jin GD(晋国栋); He GW(何国威); Zhang J(张健)
Source PublicationICTAM 2012 Proceedings
2012-08
Conference Name第23届国际理论与应用力学大会 (The 23rd International Congress of Theoretical and Applied Mechanics, ICTAM2012)
Conference Date2012年8月20
Conference PlaceBeijing
AbstractTwo fundamental problems in wall-bounded particle-laden flows are explored: how to correct the unresolved hydrodynamic
force using the lubrication approximation when a finite grid size is used in the simulation and the particle is very close to the wall,
and how to model the effective coefficient of restitution to account for the viscous dissipation of the fluid when a finite time step is
used in the simulation. A new model for lubrication correction is proposed to account for the variation of the particle velocity during
the impact. Based on the lubrication approximation, a semi-empirical model for the effective coefficient of restitution is proposed and integrated into the simulation. The numerical results obtained are in good agreement with the experimental results. Our method, therefore, provides a basis for investigating more complex wall-bounded particle-laden flows.; Two fundamental problems in wall-bounded particle-laden flows are explored: how to correct the unresolved hydrodynamic
force using the lubrication approximation when a finite grid size is used in the simulation and the particle is very close to the wall,
and how to model the effective coefficient of restitution to account for the viscous dissipation of the fluid when a finite time step is
used in the simulation. A new model for lubrication correction is proposed to account for the variation of the particle velocity during
the impact. Based on the lubrication approximation, a semi-empirical model for the effective coefficient of restitution is proposed and integrated into the simulation. The numerical results obtained are in good agreement with the experimental results. Our method, therefore, provides a basis for investigating more complex wall-bounded particle-laden flows.
KeywordLattice-boltzmann Simulation Efficient coEfficient Of Restitution Gravitational Settling Gravitational Rebound
DepartmentLNM湍流
Language英语
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/46896
Collection非线性力学国家重点实验室
Corresponding AuthorJin GD(晋国栋)
Recommended Citation
GB/T 7714
Jin GD,He GW,Zhang J. EFFICIENT COEFFICIENT OF RESTITUTION AND LATTICE-BOLTZMANN SIMULATION OF GRAVITATIONAL SETTLING AND REBOUND IN A VISCOUS FLUID[C],2012.
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