A Resolved CFD-DEM Approach Based on Immersed Boundary Method

doi:10.16183/j.cnki.jsjtu.2022.095

Abstract

Abstract:

Based on the immersed boundary method, a resolved CFD-DEM algorithm is proposed to tackle fluid-solid interaction problems which widely exist. In the proposed method, the fluid filed is described by the computational fluid dynamics in the Eulerian framework, while the movement and collision of the solids are simulated by the discrete element method in the Lagrangian framework. In order to deal with the moving interfaces between the fluid and the solids, several immersed boundary points are allocated on the boundaries of the solids. Two classic test cases are calculated to verify the accuracy of the proposed method, including the vortex-induced vibration of a cylinder and the rotational galloping of a rectangular rigid body. Good agreements are achieved between the current results and those in previous references and the reliability of the present method in modelling the fluid-solid interaction problems are proved. Finally, the sedimentation of multiple solids is simulated and the ability of the proposed CFD-DEM method in solving the complex fluid field and the collision among the solids with arbitrary shapes are verified.

Key words: fluid-solid interaction, immersed boundary method, computational fluid dynamics (CFD), discrete element method (DEM), high resolution

CLC Number:

U661
TV312

MAO Jia, XIAO Jingwen, ZHAO Lanhao, DI Yingtang. A Resolved CFD-DEM Approach Based on Immersed Boundary Method[J]. Journal of Shanghai Jiao Tong University, 2023, 57(8): 988-995.

Figures/Tables 8

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来源	θ_max/(°)	f_rot
文献[16]	16.1	0.019 7
文献[17]	15.0	0.019 1
文献[18]	15.7	0.019 8
本文方法	15.4	0.019 2