A multi-resolution SPH method for fluid-structure interactions

•Different spatial-temporal resolution for fluid and solid structure.•Position-based Verlet time integration scheme.•Time-averaged velocity and acceleration to enhance structure-fluid force matching. In this paper, we present a multi-resolution smoothed particle hydrodynamics (SPH) method for modeli...

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Bibliographic Details
Published in:Journal of computational physics Vol. 429; p. 110028
Main Authors: Zhang, Chi, Rezavand, Massoud, Hu, Xiangyu
Format: Journal Article
Language:English
Published: Cambridge Elsevier Inc 15.03.2021
Elsevier Science Ltd
Subjects:
Acceleration
Computational fluid dynamics
Computational physics
Fluid flow
Fluid-elastic structure interaction
Fluid-structure interaction
Multi-resolution
Multiple time steps
Robustness (mathematics)
Smooth particle hydrodynamics
Smoothed particle hydrodynamics
Source code
Time integration
Multiple time steps
Smoothed particle hydrodynamics
Multi-resolution
Fluid-elastic structure interaction
ISSN:0021-9991, 1090-2716
Online Access:Get full text
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Summary:•Different spatial-temporal resolution for fluid and solid structure.•Position-based Verlet time integration scheme.•Time-averaged velocity and acceleration to enhance structure-fluid force matching. 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.
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ISSN:0021-9991
1090-2716
DOI:10.1016/j.jcp.2020.110028