Journal of Shanghai Jiao Tong University ›› 2023, Vol. 57 ›› Issue (8): 988-995.doi: 10.16183/j.cnki.jsjtu.2022.095

Special Issue: 《上海交通大学学报》2023年“船舶海洋与建筑工程”专题

• Naval Architecture, Ocean and Civil Engineering • Previous Articles     Next Articles

A Resolved CFD-DEM Approach Based on Immersed Boundary Method

MAO Jia, XIAO Jingwen, ZHAO Lanhao(), DI Yingtang   

  1. College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
  • Received:2022-04-01 Revised:2022-07-21 Accepted:2022-07-27 Online:2023-08-28 Published:2023-08-31

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: