An MPI parallel DEM-IMB-LBM framework for simulating fluid-solid interaction problems

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外文摘要：The high-resolution DEM-IMB-LBM model can accurately describe pore-scale fluid-solid interactions,but its potential for use in geotechnical engineering analysis has not been fully unleashed due to its pro-hibitive computational costs.To overcome this limitation,a message passing interface(MPI)parallel DEM-IMB-LBM framework is proposed aimed at enhancing computation efficiency.This framework utilises a static domain decomposition scheme,with the entire computation domain being decomposed into multiple subdomains according to predefined processors.A detailed parallel strategy is employed for both contact detection and hydrodynamic force calculation.In particular,a particle ID re-numbering scheme is proposed to handle particle transitions across sub-domain interfaces.Two benchmarks are conducted to validate the accuracy and overall performance of the proposed framework.Subsequently,the framework is applied to simulate scenarios involving multi-particle sedimentation and submarine landslides.The numerical examples effectively demonstrate the robustness and applicability of the MPI parallel DEM-IMB-LBM framework.

外文关键词：

Discrete element method(DEM)Lattice Boltzmann method(LBM)Immersed moving boundary(IMB)Multi-cores parallelizationMessage passing interface(MPI)CPUSubmarine landslides

作者：

Ming Xia、Liuhong Deng、Fengqiang Gong、Tongming Qu、Y.T.Feng、Jin Yu

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作者单位：

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

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

Department of Civil and Environmental Engineering,Hong Kong University of Science and Technology,Hong Kong,China

Zienkiewicz Centre for Computational Engineering,Swansea University,Swansea.SA1 8EN.UK

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

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基金：

国家自然科学基金国家自然科学基金湖南省自然科学基金

项目编号：

12072217420772542022JJ30567

出版年：

2024

DOI：

10.1016/j.jrmge.2024.01.007

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)