New formula for drag coefficient of cylindrical particles--颗粒学报PARTICUOLOGY

Guo, X., Lin, J., & Nie, D. (2011). New formula for drag coefficient of cylindrical particles. Particuology, 9(2), 114-120. https://doi.org/10.1016/j.partic.2010.07.027

New formula for drag coefficient of cylindrical particles

Xiaohui Guo ^a, Jianzhong Lin ^{a b *}, Deming Nie ^a

a Institute of Fluid Mechanics, China Jiliang University, Hangzhou 310018, China
b State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China

10.1016/j.partic.2010.07.027

Volume 9, Issue 2, April 2011, Pages 114-120

Received 20 October 2009, Revised 21 June 2010, Accepted 3 July 2010, Available online 17 February 2011.

E-mail: mecjzlin@public.zju.edu.cn

Highlights

Abstract

The drag force on a cylindrical particle is calculated using lattice Boltzmann method. The results show that the drag coefficient of a particle with different orientation angles decreases with increasing Reynolds number. When the principal axis of the particle is parallel to flow, the drag coefficient is much larger than that of others and decreases fastest with increasing Reynolds number, which becomes more obvious with increasing particle aspect ratio. When the principal axis of the particle is inclined to flow, the drag coefficient is nearly the same for different particle aspect ratios. In the case of flow with small Reynolds number (Re < 100), the drag coefficient decreases with increasing orientation angle at different aspect ratios and Reynolds numbers. The drag coefficient is more sensitive to particle orientation angle when the particle orientation angle is small and the aspect ratio is large. Finally, a new correlation formula for the drag coefficient of cylindrical particle is established, with which the drag force on a cylindrical particle can be directly calculated based on the Reynolds number, particle aspect ratio and orientation angle.

Graphical abstract

Keywords

Cylindrical particle; Drag coefficient; Correlation formula; Lattice Boltzmann method

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