A particle-resolved heat-particle-fluid coupling model by DEM-IMB-LBM

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外文摘要：Multifield coupling is frequently encountered and also an active area of research in geotechnical engi-neering.In this work,a particle-resolved direct numerical simulation(PR-DNS)technique is extended to simulate particle-fluid interaction problems involving heat transfer at the grain level.In this extended technique,an immersed moving boundary(IMB)scheme is used to couple the discrete element method(DEM)and lattice Boltzmann method(LBM),while a recently proposed Dirichlet-type thermal boundary condition is also adapted to account for heat transfer between fluid phase and solid particles.The resulting DEM-IBM-LBM model is robust to simulate moving curved boundaries with constant tem-perature in thermal flows.To facilitate the understanding and implementation of this coupled model for non-isothermal problems,a complete list is given for the conversion of relevant physical variables to lattice units.Then,benchmark tests,including a single-particle sedimentation and a two-particle drafting-kissing-tumbling(DKT)simulation with heat transfer,are carried out to validate the accuracy of our coupled technique.To further investigate the role of heat transfer in particle-laden flows,two multiple-particle problems with heat transfer are performed.Numerical examples demonstrate that the proposed coupling model is a promising high-resolution approach for simulating the heat-particle-fluid coupling at the grain level.

外文关键词：

Particle-fluid interactionHeat transferDiscrete element method(DEM)Lattice Boltzmann method(LBM)Dirichlet-type thermal boundaryDirect numerical simulation

作者：

Ming Xia、Jinlong Fu、Y.T.Feng、Fengqiang Gong、Jin Yu

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作者单位：

Hunan Key Laboratory of Geomechanics and Engineering Safety,Xiangtan University,Xiangtan,411105,China

Zienkiewicz Institute for Modelling,Data and AI,Swansea University,Swansea,SA1 8EP,UK

School of Civil Engineering, Southeast University, Nanjing 211189, China

Fujian Research Center for Tunneling and Urban Underground Space Engineering,Huaqiao University,Xiamen 361021,China

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基金：

湖南省自然科学基金EPSRC Grant(UK)Scientific Research Foundation of Education Department of Hunan Province,China

项目编号：

2022JJ30567PURIFYEP/V000756/120B557

出版年：

2024

DOI：

10.1016/j.jrmge.2023.02.030

岩石力学与岩土工程学报(英文版)

中国科学院武汉岩土力学所中国岩石力学与工程学会武汉大学

岩石力学与岩土工程学报(英文版)

CSTPCD

影响因子：0.404

ISSN：1674-7755

年,卷(期)：2024.16(6)