Influence of rolling friction on single spout fluidized bed simulation--颗粒学报PARTICUOLOGY

Goniva, C., Kloss, C., Deen, N. G., Kuipers, J. A. M., & Pirker, S. (2012). Influence of rolling friction on single spout fluidized bed simulation. Particuology, 10(5), 582–591. https://doi.org/10.1016/j.partic.2012.05.002

Influence of rolling friction on single spout fluidized bed simulation

Christoph Goniva ^{a d *}, Christoph Kloss ^{a d}, Niels G. Deen ^c, Johannes A.M. Kuipers ^c, Stefan Pirker ^{a b}

a Christian-Doppler Laboratory on Particulate Flow Modelling, Johannes Kepler University, Linz, Austria
b Institute of Fluid Mechanics and Heat Transfer, Johannes Kepler University, Linz, Austria
c Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, The Netherlands
d DCS Computing GmbH, Linz, Austria

10.1016/j.partic.2012.05.002

Volume 10, Issue 5, October 2012, Pages 582-591

Received 22 September 2011, Revised 22 March 2012, Accepted 10 May 2012, Available online 27 July 2012.

E-mail: christoph.goniva@jku.at

Highlights

► A rolling friction sub-model was included in an open source CFD–DEM framework to investigate the effect of rolling friction.

► Simulations were validated against experimental and numerical results published in literature.

► Both particle–particle and particle–wall rolling friction show a similar effect on particle velocity.

Abstract

In this paper we study the effect of rolling friction on the dynamics in a single spout fluidized bed using Discrete Element Method (DEM) coupled to Computational Fluid Dynamics (CFD). In a first step we neglect rolling friction and show that the results delivered by the open source CFD–DEM framework applied in this study agree with previous simulations documented in literature. In a second step we include a rolling friction sub-model in order to investigate the effect of particle non-sphericity. The influence of particle–particle as well as particle–wall rolling friction on the flow in single spout fluidized bed is studied separately. Adequate rolling friction model parameters are obtained using first principle DEM simulations and data from literature. Finally, we demonstrate the importance of correct modelling of rolling friction for coupled CFD–DEM simulations of spout fluidized beds. We show that simulation results can be improved significantly when applying a rolling friction model, and that experimental data from literature obtained with Positron Emission Particle Tracking (PEPT) technique can be satisfactorily reproduced.

Graphical abstract

Keywords

CFD–DEM; Open source; Rolling friction; Spout fluidized bed; Non-sphericity

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