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A coupled polygonal DEM-LBM technique based on an immersed boundary method and energy-conserving contact algorithm

Min Wang, Yuntian Feng Orcid Logo, T.M. Qu, T.T. Zhao

Powder Technology, Volume: 381, Pages: 101 - 109

Swansea University Author: Yuntian Feng Orcid Logo

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Abstract

This work presents a framework of coupling polygonal discrete elements and the lattice Boltzmann method using a direct forcing immersed boundary scheme. In this technique, an energy-conserving contact algorithm is utilized to handle the interactions between convex and concave polygonal particles. Th...

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Published in: Powder Technology
ISSN: 0032-5910
Published: Elsevier BV 2021
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa55794
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Abstract: This work presents a framework of coupling polygonal discrete elements and the lattice Boltzmann method using a direct forcing immersed boundary scheme. In this technique, an energy-conserving contact algorithm is utilized to handle the interactions between convex and concave polygonal particles. The surface of a polygon is represented by discrete boundary points which includes vertices of polygonal particles and/or points interpolated from vertices. The fluid-particle coupling is obtained through the interactions of the boundary points and the imaginary fluid particles using a direct-forcing immersed boundary method. Validations of the proposed technique are made by single particle and multiple arbitrarily-shaped particle sedimentation tests, and the effect of particle shape is illustrated using a drafting-kissing-tumbling benchmark.
Keywords: Concave polygonal particle, Discrete element method, Lattice Boltzmann method, Immersed boundary method, Multiphase flow
College: College of Engineering
Start Page: 101
End Page: 109