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A multi-resolution SPH method for fluid-structure interactions
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DOI：10.1016/j.jcp.2020.110028.png)
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Abstract
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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.
Keywords:
Fluid-elastic structure interaction
Multiple time steps
Multi-resolution
Smoothed particle hydrodynamics
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