A resolved LBM-DEM coupling method for fluid-solid interaction of non-spherical particles based on the super-ellipsoid model

This paper introduces a resolved coupling method based on the LBM (Lattice Boltzmann Method and DEM (Discrete Element Method) for simulating fluid-particle interactions involving non-spherical particles. The super-ellipsoid model is applied so that a wide range of particle shapes can be represented with high accuracy and efficiency, enabling a detailed investigation of shape effects on flow behavior. The proposed method is validated by comparing simulation results with experimental data on the sedimentation of both spherical and non-spherical particles. Then a fluidized bed system containing different kinds of non-spherical particles is studied and the influence of particle shape on the flow field is investigated. The result further confirms the accuracy and robustness of this method in complex multiphase flow systems. Compared to existing LBM-DEM coupling approaches, this study is more accurate and efficient for simulating flow fields involving particles with smooth surfaces, offering a powerful tool for the study of multiphase systems with regular non-spherical particles. (c) 2025 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights are reserved, including those for text and data mining, AI training, and similar technologies.