Validation of fluid–particle interaction force relationships in binary-solid suspensions--颗粒学报PARTICUOLOGY

Rotondi, M., Di Felice, R., & Pagliai, P. (2015). Validation of fluid–particle interaction force relationships in binary-solid suspensions. Particuology, 23, 40-48. https://doi.org/10.1016/j.partic.2014.12.010

Validation of fluid–particle interaction force relationships in binary-solid suspensions

Marco Rotondi, Renzo Di Felice ^*, Paolo Pagliai

Department of Civil, Chemical and Environmental Engineering, University of Genova, Via Opera Pia 15, 16145 Genova, Italy

10.1016/j.partic.2014.12.010

Volume 23, December 2015, Pages 40-48

Received 26 September 2014, Revised 24 November 2014, Accepted 18 December 2014, Available online 28 April 2015, Version of Record 2 December 2015.

E-mail: renzo.difelice@unige.it

Highlights

• Various correlations for fluid–particle interaction forces were tested against experimental data.

• The correlation based on "generalized" Archimedes' principle produced more realistic predictions.

• It is of paramount importance how the buoyancy force in a solid–fluid suspension is defined.

Abstract

In this work several relationships governing solid–fluid dynamic interaction forces were validated against experimental data for a single particle settling in a suspension of other smaller particles. It was observed that force relationships based on Lattice-Boltzmann simulations did not perform as well as other interaction types tested. Nonetheless, it is apparent that, in the case of a suspension of different particle types, it is important that the correct choice is made as to how the contribution to the overall fluid–particle interaction force is split between buoyancy and drag. Experimental evidence clearly suggests that the "generalized" Archimedes' principle (where the foreign particle is considered to displace the whole suspension and not just the fluid) provides the best result.

Graphical abstract

Keywords

Solid–fluid suspensions; Solid–fluid interaction forces; Drag force; Buoyancy force

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