Simulation of geometric effects of particles on flows and drag around abnormal shape particles

Gao Ji-xian;Liu Hui;Li Cheng-yue;Yang Li-ying

Journal of Beijing University of Chemical Technology ›› 2004, Vol. 31 ›› Issue (1) : 22-25,2.

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Journal of Beijing University of Chemical Technology ›› 2004, Vol. 31 ›› Issue (1) : 22-25,2.
研究论文

Simulation of geometric effects of particles on flows and drag around abnormal shape particles

  • Gao Ji-xian;Liu Hui;Li Cheng-yue;Yang Li-ying
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Abstract

CFD modeling and simulation of flows and experienced drag over abnormal-shaped particles, such as sphere, hexahedron, trihedron, cylinder and wheel shapes,were investigated over a range of Reynolds number from 10 to 400. Based on simulation results, the conventional method characterizing an abnormal-shaped particle by using the grain volume or surface area-mean diameters was re-evaluated and was found to be improper in terms of their use in particle drag prediction. Accordingly, a new parameter was defined to take account of the geometrical effects involved and put forword a new correlation of drag coefficients for the above four non-spherical particles. The prediction of drag coefficients was grealty improved.

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Gao Ji-xian;Liu Hui;Li Cheng-yue;Yang Li-ying. Simulation of geometric effects of particles on flows and drag around abnormal shape particles[J]. Journal of Beijing University of Chemical Technology, 2004, 31(1): 22-25,2

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