Simulated of flow in a three-dimensional porous structure by using the IB-SEM system

Jing Wang, Shucai Li, Liping Li, Shuguang Song, Peng Lin and Xingzhi Ba

Abstract

The IB-SEM numerical method combines the spectral/hp element method and the rigid immersed boundary method. This method avoids the problems of low computational efficiency and errors that are caused by the re-division of the grid when the solids move. Based on the Fourier transformation and the 3D immersed boundary method, the 3D IB-SEM system was established. Then, using the open MPI and the Hamilton HPC service, the computational efficiency was increased substantially. The flows around a cylinder and a sphere were simulated by the system. The surface of the cylinder generates vortices with alternating shedding, and these vortices result in a periodic force acting on the surface of the cylinder. When the shedding vortices enter the flow field behind the cylinder, a recirculation zone is formed. Finally, the three-dimensional pore flow was successfully investigated.

Key Words

Fourier transformation; 3D immersed boundary method; the 3D IB-SEM system; open MPI

Address

Jing Wang, Shucai Li, Liping Li, Peng Lin and Xingzhi Ba: 1.) School of Qilu Transportation, Shandong University, Jinan 250061, China 2.) Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan 250061, China Shuguang Song: 1.) Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan 250061, China 2.) School of Transportation Engineering, Shandong Jianzhu University, Jinan 250101, China

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