Numerical simulation of sudden-expansion two-phase flows with two-scale second-order moment particle turbulence model

2007, Volume 1, Issue 2

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Frontiers in Energy >> 2007, Volume 1, Issue 2 doi: 10.1007/s11708-007-0026-6

Numerical simulation of sudden-expansion two-phase flows with two-scale second-order moment particle turbulence model

1.Aeronautic and Mechanical Engineering College, Nanchang University of Aeronautics, Nanchang 330063, China; 2.Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China;

Available online: 2007-06-05

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Abstract

A two-scale second-order moment particle turbulence model is developed, based on the concept of particle large-scale fluctuation due to turbulence and particle small-scale fluctuation due to collision. The model is employed to simulate gas-particle flows in a sudden-expansion chamber. Simulation results are compared with the experimental results and with those obtained by the single-scale second-order moment two-phase turbulence model. It is shown that the two-scale model is with higher calculating accuracy than the single-scale model.

Keywords

gas-particle ; single-scale second-order ; large-scale fluctuation ; second-order ; sudden-expansion

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