Investigation of gas-solid two-phase flow across circular cylinders with discrete vortex method

被引：21

作者：

Chen Bin ^{[1
]}

Wang Cong ^{[1
]}

Wang Zhiwei ^{[1
]}

Guo Liejin ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710049, Shaanxi, Peoples R China

来源：

APPLIED THERMAL ENGINEERING | 2009年 / 29卷 / 8-9期

基金：

中国国家自然科学基金;

关键词：

Gas-solid two-phase flow; Particle collision model; Discrete vortex method; Flow across cylinders; NUMERICAL-SIMULATION; PARTICLE DISPERSION; BUBBLE; BEHAVIOR; SPHERE; MODEL; BODY;

D O I：

10.1016/j.applthermaleng.2008.06.025

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In present paper, a Lagrangian-Lagrangian model is proposed to study gas-solid two-phase flow across single cylinder and two tandem cylinders at high Reynolds number. In this model, the single-phase flow is simulated by discrete vortex method and the particle trajectories are tracked by particle motion equation. A sub-cycle is introduced to adjust time-step in the particle collision model, through which the simulation of two phases is coupled. Validated by the comparison of the particle trajectory in Rankine vortex with literature, this model is used to study single-phase flow across single cylinder and cylinders with different arrangements firstly to get transient flow field and drag coefficients. Then, gas-solid two-phase flow across cylinders with different arrangement is studied and particle distribution is obtained under different Stokes number for horizontal and vertical particle transport cases. The settlement, entrainment and aggregation of solid particles moving with the large-scale coherent vortex structure in the wake of single cylinder and between two cylinders are numerically investigated, and the effects of St number on the distribution of solid particles are obtained. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：1457 / 1466

页数：10

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