| 粘性流场中固体颗粒启动和沉降过程的直接数值模拟 |
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| 引用本文： | 万德成. 粘性流场中固体颗粒启动和沉降过程的直接数值模拟[J]. 人民珠江, 2006, 29(6): 29-34,70 |
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| 作者姓名： | 万德成 |
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| 作者单位： | 上海交通大学船舶海洋与建筑工程学院海洋工程国家重点实验室,上海,200030 |
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| 基金项目： | 上海市浦江人才计划;国家自然科学基金;高等学校博士学科点专项科研项目;上海市科委重点基础研究课题 |
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| 摘 要： | 利用多重网格虚拟边界有限元法（multigrid fictitious boundary method，MFBM），对粘性流场中固体颗粒的启动和沉降过程进行直接数值模拟。在计算过程中，计算网格是固定的多重结构有限元网格，固体颗粒可自由通过网格而无需重新生成网格。流体运动由Navier-Stokes方程控制，固体颗粒运动由Newton-Euler方程控制，用MFBM处理流体与固体颗粒的相互作用。通过对单个固体颗粒和多个固体颗粒启动和沉降过程的数值模拟，表明MFBM提供了一个数值模拟颗粒启动和沉降问题非常有效的途径。
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| 关 键 词： | 多重网格虚拟边界有限元法 粘性流体 颗粒升沉 |
| 文章编号： | 1001-9235（2006）06-0029-06 |
| 收稿时间： | 2006-11-30 |
| 修稿时间： | 2006-11-30 |
Direct Numerical Simulations of Sedimentation and Lift- off of Rigid Particles in Viscous Flows |
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| WAN De-cheng. Direct Numerical Simulations of Sedimentation and Lift- off of Rigid Particles in Viscous Flows[J]. Pearl River, 2006, 29(6): 29-34,70 |
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| Authors: | WAN De-cheng |
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| Affiliation: | School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai, 200030 ,China |
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| Abstract: | An efficient multigrid fictitious boundary method(MFBM) for the detailed simulation of the sedimentations and lift-off of rigid particles in viscous flows is presented in this paper.The calculation is carried on a fixed multigrid finite element mesh on which fluid equations are satisfied everywhere,and the rigid particles are allowed to move freely through the mesh.The motion of the rigid particle is modeled by the Newton-Euler equations.Numerical experiments are presented to show that the presented MFBM provides a robust and efficient approach to directly simulate the sedimentations and lift-off of rigid particles in viscous flows. |
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| Keywords: | Sedimentation Lift - off Fictitious Boundary Method FEM Multigrid |
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