Two-phase turbulence models for simulating dense gas–particle flows--颗粒学报PARTICUOLOGY

Zhou, L., Yu, Y., Cai, F., & Zeng, Z. (2014). Two-phase turbulence models for simulating dense gas–particle flows. Particuology, 16, 100–107. https://doi.org/10.1016/j.partic.2013.06.007

Two-phase turbulence models for simulating dense gas–particle flows

Lixing Zhou^a *, Yong Yu ^b, Feipeng Cai ^c, Zhuoxiong Zeng ^d

a Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
b Department of Thermal Engineering, Beijing University of Science and Engineering, Beijing 100083, China
c Institute of Energy, Shandong Academy of Science, Shandong 250000 , China
d School of Aeronautics, Nanchang University of Aeronautics, Nanchang 330000, China

10.1016/j.partic.2013.06.007

Volume 16, October 2014, Pages 100-107

Received 22 March 2013, Revised 23 May 2013, Accepted 1 June 2013, Available online 6 September 2013.

E-mail: zhoulx@mail.tsinghua.edu.cn

Highlights

• Two-phase turbulence models for simulating dense gas–particle flows were proposed.

• These models accounted for both anisotropic particle turbulence and inter-particle collisions.

• Simulation results were validated by reported experimental data.

• USM-Θ and two-scale USM models were well for simulating particle fluctuation and Reynolds stress.

Abstract

The two-fluid model is widely adopted in simulations of dense gas–particle flows in engineering facilities. Present two-phase turbulence models for two-fluid modeling are isotropic. However, turbulence in actual gas–particle flows is not isotropic. Moreover, in these models the two-phase velocity correlation is closed using dimensional analysis, leading to discrepancies between the numerical results, theoretical analysis and experiments. To rectify this problem, some two-phase turbulence models were proposed by the authors and are applied to simulate dense gas–particle flows in downers, risers, and horizontal channels; Experimental results validate the simulation results. Among these models the USM-Θ and the two-scale USM models are shown to give a better account of both anisotropic particle turbulence and particle–particle collision using the transport equation model for the two-phase velocity correlation.

Graphical abstract

Keywords

Dense gas–particle flows; Two-phase turbulence models; Anisotropic turbulence

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