| NUMERICAL STUDY OF PARTICLE DISTRIBUTION IN WAKE OF LIQUID-PARTICLE FLOWS PAST A CIRCULAR CYLINDER USING DISCRETE VORTEX METHOD |
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| 作者姓名： | 黄远东 吴文权 |
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| 作者单位： | Department of Environmental Engineering University of Shanghai for Science and Technology Shanghai 200093，P. R. China，Department of Environmental Engineering University of Shanghai for Science and Technology，Shanghai 200093，P. R. China |
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| 基金项目： | 中国科学院资助项目;上海市教委资助项目 |
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| 摘 要： | Particle-laden water flows past a circular cylinder were numerically investigated. The discrete vortex method (DVM) was employed to evaluate the unsteady water flow fields and a Lagrangian approach was applied for tracking individual solid particles. A dispersion function was defined to represent the dispersion scale of the particle. The wake vortex patterns, the distributions and the time series of dispersion functions of particles with different Stokes numbers were obtained. Numerical results show that the particle distribution in the wake of the circular cylinder is closely related to the particle's Stokes number and the structure of wake vortices: (1) the intermediate sized particles with Stokes numbers, St, of 0.25, 1.0 and 4.0 can not enter the vortex cores and concentrate near the peripheries of the vortex structures, (2) in the circular cylinder wake, the dispersion intensity of particles decreases as St is increased from 0.25 to 4.0.
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| 关 键 词： | 数字研究 粒子分布 流体-微粒流 离散涡旋法 |
| 收稿时间： | 2004-06-18 |
| 修稿时间： | 2005-12-15 |
Numerical study of particle distribution in wake of liquid-particle flows past a circular cylinder using discrete vortex method |
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| Yuan-dong Huang Doctor,Wen-quan Wu.NUMERICAL STUDY OF PARTICLE DISTRIBUTION IN WAKE OF LIQUID-PARTICLE FLOWS PAST A CIRCULAR CYLINDER USING DISCRETE VORTEX METHOD[J].Applied Mathematics and Mechanics(English Edition),2006,27(4):535-542. |
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| Authors: | Yuan-dong Huang Doctor Wen-quan Wu |
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| Institution: | Department of Environmental Engineering, University of Shanghai for Science and Technology,Shanghai 200093, P. R. China |
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| Abstract: | Particle-laden water flows past a circular cylinder were numerically investigated. The discrete vortex method (DVM) was employed to evaluate the unsteady water flow fields and a Lagrangian approach was applied for tracking individual solid particles. A dispersion function was defined to represent the dispersion scale of the particle. The wake vortex patterns, the distributions and the time series of dispersion functions of particles with different Stokes numbers were obtained. Numerical results show that the particle distribution in the wake of the circular cylinder is closely related to the particle's Stokes number and the structure of wake vortices: (1) the intermediate sized particles with Stokes numbers, St, of 0.25, 1.0 and 4.0 can not enter the vortex cores and concentrate near the peripheries of the vortex structures, (2) in the circular cylinder wake, the dispersion intensity of particles decreases as St is increased from 0.25 to 4.0. |
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| Keywords: | liquid-particle high Reynolds number discrete vortex method (DVM) wake vortex particle dispersion |
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