EFFICIENT COEFFICIENT OF RESTITUTION AND LATTICE-BOLTZMANN SIMULATION OF GRAVITATIONAL SETTLING AND REBOUND IN A VISCOUS FLUID
文献类型：会议论文
| 作者 | Jin GD(晋国栋) ; He GW(何国威); Zhang J(张健)
|
| 出版日期 | 2012-08 |
| 会议名称 | 第23届国际理论与应用力学大会 (The 23rd International Congress of Theoretical and Applied Mechanics, ICTAM2012) |
| 会议日期 | 2012年8月20 |
| 会议地点 | Beijing |
| 关键词 | LATTICE-BOLTZMANN SIMULATION EFFICIENT COEFFICIENT OF RESTITUTION GRAVITATIONAL SETTLING GRAVITATIONAL REBOUND |
| 通讯作者 | Jin GD(晋国栋) |
| 中文摘要 | 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. |
| 英文摘要 | 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. |
| 会议录 | ICTAM 2012 Proceedings
 |
| 学科主题 | 流体力学 ; 湍流 ; 多相流 |
| 语种 | 英语 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/46896]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 推荐引用方式 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]. 见:第23届国际理论与应用力学大会 (The 23rd International Congress of Theoretical and Applied Mechanics, ICTAM2012). Beijing. 2012年8月20. |
入库方式： OAI收割
来源：力学研究所
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