Spherical versus elongated particles – Numerical investigation of mixing characteristics in a gas fluidized bed

被引：14
作者：
Mema I. [1 ]
Padding J.T. [1 ]
机构：
[1] Complex Fluid Processing, Department of Process and Energy, Delft University of Technology, Leeghwaterstraat 39, CB Delft
来源：
Mema, Ivan (I.Mema@tudelft.nl) | 1600年 / Elsevier Ltd卷 / 08期
基金：
欧洲研究理事会;
关键词：
CFD-DEM; Fluidized bed; Geldart D; Mixing; Non-spherical particles;
D O I：
10.1016/j.cesx.2020.100079
中图分类号：
学科分类号：
摘要：
The possibility to offer good intermixing between particles is one of the main properties that make fluidized beds such an important industrial appliance. In this work, we use CFD-DEM simulations to compare mixing characteristics of spherical (AR-1) to elongated spherocylindrical particles (AR-4) of aspect ratio In simulation of AR-4 particles, single-particle and multi-particle correlations for hydrodynamic forces are tested. The results show that elongated particles have more vigorous intermixing and lower mixing times compared to spherical particles. Multi-particle correlations have a slight effect on particle mixing, and they increase the difference between AR-1 and AR-4 particles at higher gas velocities. Including hydrodynamic lift force and torque in the case of AR-4 particles leads to more vigorous mixing and lower mixing times. © 2020 The Authors
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