Comparison of gas particle flow prediction from large eddy simulation and Reynolds-averaging Navier-Stokes modeling |
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| Authors: | Zhuo-xiong Zeng De-chuan Sun Li-xing Zhou |
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| Institution: | [1]Aircraft Engineering College, Nanchang Hangkong University, Nanchang 330063, China; [2]School of Astronautics, Northwestern Polytechnical University, Xi＇an 710072, China; [3]Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China |
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| Abstract: | In order to account for the effect of particle existence on gas-particle turbulence flow in large-eddy simulation (LES), a
new gas-particle turbulent kinetic energy subgrid-scale (SGS) turbulence model is established, and the effect of particle
wake is also considered in gas turbulent kinetic energy SGS turbulence model. Simulation of gas-particle turbulence flow in
backward-facing step is carried out by LES using present model and by unified second-order moment (USM) model. The prediction
statistical results including mean velocity and fluctuation velocity by LES using present model are in reasonable agreement
with the experimental results. It is shown that present model is with higher calculating accuracy than USM model, which indicates
that the turbulent kinetic energy SGS turbulence model is suitable. |
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