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Revisiting the empirical particle‐fluid coupling model used in DEM‐CFD by high‐resolution DEM‐LBM‐IMB simulations: A 2D perspective
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Jinlong Fu ,
Yuntian Feng ,
Min Wang
International Journal for Numerical and Analytical Methods in Geomechanics, Volume: 47, Issue: 5, Pages: 862 - 879
Swansea University Authors:
Jinlong Fu , Yuntian Feng
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DOI (Published version): 10.1002/nag.3496
Abstract
The work investigates the applicability of the unresolved Computational Fluid Dynamics and Discrete Element Method (CFDDEM) technique based on empirical equations for fluid-particle coupling. We first carry out a series of representative volume element simulations using the high-resolution particle-...
| Published in: | International Journal for Numerical and Analytical Methods in Geomechanics |
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| ISSN: | 0363-9061 1096-9853 |
| Published: |
Wiley
2023
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa62446 |
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| Abstract: |
The work investigates the applicability of the unresolved Computational Fluid Dynamics and Discrete Element Method (CFDDEM) technique based on empirical equations for fluid-particle coupling. We first carry out a series of representative volume element simulations using the high-resolution particle-resolved Lattice Boltzmann method and Discrete Element Method (LBMDEM) coupled by an Immersed Moving Boundary (IMB) scheme. Then, we compare the results obtained by both LBMDEM and empirical equations used in unresolved CFDDEM with analytical solutions. It is found that the existing empirical equations used in solving fluid-particle interactions in 2D CFDDEM fail to accurately calculate the hydrodynamic force applied to solid particles. The underlying reason is that the existing empirical models are obtained based on 3D experimental results and thus are not applicable to 2D problems. Based on the simulation results, a new drag coefficient model is then proposed. The estimated drag forces using the new model are compared favourably with the simulated ones, indicating the good performance of the proposed model. |
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| Keywords: |
Computational fluid dynamics, empirical equations, fluid-particle coupling, Lattice Boltzmannmethod, seepage |
| College: |
Faculty of Science and Engineering |
| Issue: |
5 |
| Start Page: |
862 |
| End Page: |
879 |