Experimental study of settling and drag on cuboids with square base--颗粒学报PARTICUOLOGY

Wang, J., Qi, H., & Zhu, J. (2011). Experimental study of settling and drag on cuboids with square base. Particuology, 9(3), 298–305. https://doi.org/10.1016/j.partic.2010.11.002

Experimental study of settling and drag on cuboids with square base

Jinsheng Wang, Haiying Qi^*, Junzong Zhu

Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Tsinghua University, Beijing 100084, China

10.1016/j.partic.2010.11.002

Volume 9, Issue 3, June 2011, Pages 298-305

Received 12 July 2010, Revised 12 October 2010, Accepted 22 November 2010, Available online 15 March 2011.

E-mail: hyqi@mail.tsinghua.edu.cn

Highlights

Abstract

The drag on non-spherical particles is an important basic parameter for multi-phase flows such as in biomass combustion, chemical blending, and mineral processing. Though there is much experimental research on such particles, there are few results for cuboids. This paper presents data for cuboids with a square base in static glycerin–water solutions of various volume concentrations. Complex motions were observed and characterized. A dimensionless expression is given for terminal velocity u_t as a function of Archimedes number Ar which is used to develop an accurate correlation for friction factor C_D. The accuracy of the correlation is 7.9% compared to experimental data in the literature. For both square plates and square rods, the terminal velocity per unit mass, u_t/m_p, was used to characterize the influence of particle geometry on velocity, which was shown to be linear.

Graphical abstract

Keywords

Cuboid particles; Unsteady settling behavior; Archimedes number; Terminal velocity; Drag coefficient

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