Development of A Fully Lagrangian Smoothed Particle Hydrodynamics -Based Coupled Method for Simulation of Fluid– Structure Interaction

Document Type : Research Article

Authors

Department of Mechanical Engineering,Yazd University

Abstract

In this research, an enhanced computational coupling method is proposed for the transient problems of incompressible fluid-elastic structure interaction based on the smoothed particle hydrodynamics method. The coupling process is conducted between an incompressible smoothed particle hydrodynamics fluid model and a totally Lagrangian smoothed particle hydrodynamics structural model. In the incompressible smoothed particle hydrodynamics method, due to the importance of smoothing particle distribution for accurate and stable simulations with noise-free pressure field, a new scheme for particle shifting has been proposed to regulate particle distribution. In contrast to numerical errors at the free surface in traditional particle shifting algorithm, this proposed algorithm as a suitable treatment for discontinuous boundaries such as the free surface presents an optimized particle shifting scheme without need to adjust the new parameters. The proposed numerical coupling method was examined  by simulating several benchmarks in fluid-structure interaction and the results were compared with experimental and numerical results. The considered problems of fluid-structure interaction in this paper include the dam-breaking with an elastic gate and the deflection of an elastic obstacle due to fluid sloshing. The agreement between the presented results with the literature data shows the ability of the proposed model to simulate the phenomenon of fluid-structure interaction.

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References

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Amirkabir Journal of Mechanical Engineering
Volume 52, Issue 11
February 2021
Pages 3155-3170

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