Abstract
Multiphase (gas-solid) flows are encountered in numerous industrial applications such as pharmaceutical, food, agricultural processing and energy generation. A coupled computational fluid dynamics (CFD) and discrete element method (DEM) approach is a popular way to study such flows at a particle scale. However, most of these studies deal with spherical particles while in reality, the particles are rarely spherical. The particle shape can have significant effect on hydrodynamics in a fluidized bed. Moreover, most studies in literature use inaccurate drag laws because accurate laws are not readily available. The drag force acting on a non-spherical particle can vary considerably with particle shape, orientation with the flow, Reynolds number and packing fraction. In this work, the CFD-DEM approach is extended to model a laboratory scale fluidized bed of spherocylinder (rod-like) particles. These rod-like particles can be classified as Geldart D particles and have an aspect ratio of 4. Experiments are performed to study the particle flow behavior in a quasi-2D fluidized bed. Numerically obtained results for pressure drop and bed height are compared with experiments. The capability of CFD-DEM approach to efficiently describe the global bed dynamics for fluidized bed of rod-like particles is demonstrated.
Original language | English |
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Article number | 06019 |
Number of pages | 4 |
Journal | EPJ Web of Conferences |
Volume | 140 |
DOIs | |
Publication status | Published - 30 Jun 2017 |
Event | 8th International Conference on Micromechanics on Granular Media (Powders and Grains (PG)2017), July 3-7, 2017, Montpellier, France - Corum conference cente, Montpellier, France Duration: 3 Jul 2017 → 7 Jul 2017 http://www.pg2017.org/en/ |