A multi-resolution SPH method for fluid-structure interactions

JOURNAL OF COMPUTATIONAL PHYSICS

卷:429

Article

Zhang, Chi¹  Rezavand, Massoud¹  Hu, Xiangyu¹ 

[1] Tech Univ Munich, Dept Mech Engn, D-85748 Garching, Germany

关键词: Fluid-elastic structure interaction;    Multiple time steps;    Multi-resolution;    Smoothed particle hydrodynamics;   

DOI  :  10.1016/j.jcp.2020.110028

来源: Elsevier

【 摘 要 】

In this paper, we present a multi resolution smoothed particle hydrodynamics (SPH) method for modeling fluid-structure interaction (FSI) problems. By introducing different smoothing lengths and time steps, the spatial-temporal discretization is applied with different resolutions for fluid and structure. To ensure momentum conservation at the fluid-structure coupling, a position-based Verlet time integration scheme is introduced. Furthermore, the time-averaged velocity and acceleration of solid particles are introduced to enhance force matching in the fluid and solid equations. A set of numerical examples including several bio-mechanical problems are considered to demonstrate the efficiency, accuracy and robustness of the present method. An open-source code for all the examples is also provided. (C) 2020 Elsevier Inc. All rights reserved.

【 授权许可】

Free