Fluctuation Velocity Correlation Closure Model for
Dense Gas-Particle Turbulent Flow

doi:10.1007/s12204-012-1303-z

上海交通大学学报（英文版） ›› 2012, Vol. 17 ›› Issue (4): 447-451.doi: 10.1007/s12204-012-1303-z

Fluctuation Velocity Correlation Closure Model for Dense Gas-Particle Turbulent Flow

ZENG Zhuo-xiong (曾卓雄), CHEN Chao-jie (陈超杰)

(Aeronautic and Mechanical Engineering college, Nanchang Hangkong University, Nanchang 330063, China)

出版日期:2012-08-30 发布日期:2012-11-16
通讯作者: ZENG Zhuo-xiong (曾卓雄) E-mail: zengzhx@163.com

Fluctuation Velocity Correlation Closure Model for Dense Gas-Particle Turbulent Flow

ZENG Zhuo-xiong (曾卓雄), CHEN Chao-jie (陈超杰)

(Aeronautic and Mechanical Engineering college, Nanchang Hangkong University, Nanchang 330063, China)

Online:2012-08-30 Published:2012-11-16
Contact: ZENG Zhuo-xiong (曾卓雄) E-mail: zengzhx@163.com

摘要/Abstract

摘要： Turbulence model of kg-εg-kp-εp-kpg-θ is proposed. In the model, the two-phase velocity correlation turbulent kinetic energy kpg is modeled by transport equation. To close this turbulence model, algebraic expressions of two-phase Reynolds stresses and two-phase velocity correlation variable are established by considering both gas-particle interaction and anisotropy. This turbulence model is used to simulate dense gas-particle flow in a riser and in a downer. The predicted results show the core-annulus flow structure observed in the riser and the skin effect of particle concentration in the downer. The present model gives simulation results in much better agreement with the experimental results than those obtained by kg-εg-kp-εp-θ model which is simply closed using a semi-empirical dimensional analysis.

关键词: gas-particle flows, turbulence model, numerical simulation

Abstract: Turbulence model of kg-εg-kp-εp-kpg-θ is proposed. In the model, the two-phase velocity correlation turbulent kinetic energy kpg is modeled by transport equation. To close this turbulence model, algebraic expressions of two-phase Reynolds stresses and two-phase velocity correlation variable are established by considering both gas-particle interaction and anisotropy. This turbulence model is used to simulate dense gas-particle flow in a riser and in a downer. The predicted results show the core-annulus flow structure observed in the riser and the skin effect of particle concentration in the downer. The present model gives simulation results in much better agreement with the experimental results than those obtained by kg-εg-kp-εp-θ model which is simply closed using a semi-empirical dimensional analysis.

Key words: gas-particle flows, turbulence model, numerical simulation

中图分类号:

O 36

ZENG Zhuo-xiong (曾卓雄), CHEN Chao-jie (陈超杰). Fluctuation Velocity Correlation Closure Model for Dense Gas-Particle Turbulent Flow[J]. 上海交通大学学报（英文版）, 2012, 17(4): 447-451.

ZENG Zhuo-xiong (曾卓雄), CHEN Chao-jie (陈超杰). Fluctuation Velocity Correlation Closure Model for Dense Gas-Particle Turbulent Flow[J]. Journal of shanghai Jiaotong University (Science), 2012, 17(4): 447-451.

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Fluctuation Velocity Correlation Closure Model for Dense Gas-Particle Turbulent Flow

Fluctuation Velocity Correlation Closure Model for Dense Gas-Particle Turbulent Flow

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