Influence of rolling friction on single spout fluidized bed simulation

• Published in: Particuology Vol. 10; no. 5; pp. 582 - 591
• Main Authors: Goniva, Christoph, Kloss, Christoph, Deen, Niels G., Kuipers, Johannes A.M., Pirker, Stefan
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.10.2012; DCS Computing GmbH, Linz, Austria%Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, The Netherlands%Christian-Doppler Laboratory on Particulate Flow Modelling, Johannes Kepler University, Linz, Austria; Institute of Fluid Mechanics and Heat Transfer, Johannes Kepler University, Linz, Austria; Christian-Doppler Laboratory on Particulate Flow Modelling, Johannes Kepler University, Linz, Austria
• Subjects: CFD–DEM; Computational fluid dynamics; Computer simulation; Discrete element method; Dynamic tests; Fluidized beds; Mathematical models; Non-sphericity; Open source; Particle tracking; Rolling friction; Spout fluidized bed; 文献记载; 模拟; 正电子发射; 流化床; 滚动摩擦; 离散单元法; 第一原理计算; 计算流体动力学; Spout fluidized bed; Rolling friction; CFD–DEM; Non-sphericity; Open source; CFD-DEM; Roiling friction
• ISSN: 1674-2001; 2210-4291
• DOI: 10.1016/j.partic.2012.05.002

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 Trackin~ fPEPT） technique can be satisfactorily reoroduced.