An improved stochastic separated flow model for turbulent two-phase flow |
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Authors: | C K Chan H Q Zhang K S Lau |
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Affiliation: | (1) Department of Applied Mathematics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, HK;(2) Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China, CN;(3) Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, HK |
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Abstract: | An improved stochastic separated flow model is proposed to obtain reasonable statistical characteristics of a two-phase flow.
Effects of the history of a particle and its current trajectory position on the mean-square fluctuating velocity of the dispersed
phase are continuously considered in this model. Comparing with the conventional model, results using the improved model are
more reasonable and can also be obtained more easily. Furthermore, the improved model requires less computational particles
for simulating dispersed-phase turbulence at the beginning of the stochastic trajectory. In this paper, an application in
turbulent two-phase flow of planar mixing layer is carried out. Numerical results including velocity, mean-square fluctuating
velocity, particle number density and pdf of fluctuation velocity of dispersed phase are shown to compare well with experimental
data. |
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Keywords: | |
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