Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/24009
Title: Numerical simulation of gas-particle flows behind a backward-facing step using an improved stochastic separated flow model
Authors: Chan, CK 
Zhang, HQ
Lau, KS
Issue Date: 2001
Publisher: Springer
Source: Computational mechanics, 2001, v. 27, no. 5, p. 412-417 How to cite?
Journal: Computational mechanics 
Abstract: An improved stochastic separated flow (ISSF) model developed by the present authors is tested in gas-particle flows behind a backward-facing step, in this paper. The gas phase of air and the particle phase of 150 μm glass and 70 μm copper spheres are numerically simulated using the k-ε model and the ISSF model, respectively. The predicted mean streamwise velocities as well as streamwise and transverse fluctuating velocities of both phases agree well with experimental data reported by Fessler. The reattachment length of 7.6H matches well with the experimental value of 7.4H. Distributions of particle number density are also given and found to be in good agreement with the experiment. The sensitivity of the predicted results to the number of calculation particles is studied and the improved model is shown to require much less calculation particles and less computing time for obtaining reasonable results as compared with the traditional stochastic separated flow model. It is concluded that the ISSF model can be used successfully in the prediction of backward-facing step gas-particle flows, which is characterised by having recirculating regions and anisotropic fluctuating velocities.
URI: http://hdl.handle.net/10397/24009
ISSN: 0178-7675
EISSN: 1432-0924
DOI: 10.1007/s004660100253
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