期刊
CHEMICAL ENGINEERING SCIENCE
卷 62, 期 1-2, 页码 246-255出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ces.2006.08.054
关键词
fluidisation; segregation; discrete particle model; drag force; boundary conditions
Discrete particle simulations of a segregating system are performed using various drag relations and boundary conditions, and compared to experiments. The boundary conditions on the walls are found to have a large influence on the segregation behaviour of the fluidised bed, where no-slip conditions result in unrealistic flow patterns. A polydispersity factor, which was recently derived on the basis of lattice-Boltzmann (LBM) simulations, is found to have a major effect on the segregation velocity and the final degree of segregation. The best agreement with experimental results is obtained with drag relations that were recently proposed based on LBM-simulations in combination with the aforementioned polydispersity factor. (c) 2006 Elsevier Ltd. All rights reserved.
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