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A novel CFD-DEM coarse-graining method based on the Voronoi tessellation

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Title: A novel CFD-DEM coarse-graining method based on the Voronoi tessellation
Authors: Che, H
O'Sullivan, C
Sufian, A
Smith, E
Item Type: Journal Article
Abstract: In unresolved flow CFD-DEM simulations, the porosity values for each CFD cell are determined using a coarse-graining algorithm. While this approach enables coupled simulations of representative numbers of particles, the influence of the porosity local to the particles on the fluid-particle interaction force is not captured. This contribution considers a two-grid coarse-graining method that determines a local porosity for each particle using a radical Voronoi tessellation of the system. A relatively fine, regular point cloud is used to map these local porosity data to the CFD cells. The method is evaluated using two different cases considering both disperse and tightly packed particles. The data show that the method conserves porosity data, is reasonably grid-independent and can generate a relatively smooth porosity field. The new method can more accurately predict the fluid-particle interactive force for polydisperse particle system than alternative methods that have been implemented in unresolved CFD-DEM codes.
Issue Date: 1-May-2021
Date of Acceptance: 18-Feb-2021
URI: http://hdl.handle.net/10044/1/88202
DOI: 10.1016/j.powtec.2021.02.025
ISSN: 0032-5910
Publisher: Elsevier
Start Page: 479
End Page: 493
Journal / Book Title: Powder Technology
Volume: 384
Copyright Statement: © 2021 Elsevier B.V. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor/Funder: Engineering & Physical Science Research Council (E
Engineering & Physical Science Research Council (E
Engineering & Physical Science Research Council (E
Funder's Grant Number: eCSE08-3
EP/V502354/1
EP/P010393/1
Keywords: Science & Technology
Technology
Engineering, Chemical
Engineering
Radical Voronoi tessellation
CFD-DEM
Coarse-graining
Fluid-particle interactive force
0904 Chemical Engineering
0913 Mechanical Engineering
0914 Resources Engineering and Extractive Metallurgy
Chemical Engineering
Publication Status: Published
Online Publication Date: 2021-02-19
Appears in Collections:Civil and Environmental Engineering
Faculty of Engineering



This item is licensed under a Creative Commons License Creative Commons