Abstract The present study introduces the concept of pseudo-fluid particles for modeling fluid-rigid body interaction in Smoothed Particle Hydrodynamics (SPH). Such particles obey rigid body dynamics in a fully coupled framework with fluid pressure forces acting as external excitations for the object. The proposed algorithm allows treating the actual rigid body as a hollow shape composed of few layers of pseudo-fluid particles, the mass of which is introduced as an input data, rather than computed by summing up the contribution from individual particles. This decreases the computational cost by reducing the number of particles to be involved in the simulation. A modification is introduced in the discretized mass conservation equation which improves the computational accuracy when the flow is mostly dominated by hydrostatic pressure distribution. To highlight the role of this modification, a buoyant floating object is shown to properly maintain its initial equilibrium over relatively long simulation time. The efficiency of proposed model is then evaluated by reproducing the well-known Scott Russell’s wave generator in three cases, followed by the wedge water entry problem. Comparisons with available experimental measurements demonstrate reasonable agreement in predicting different aspects of generated flow field.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Pseudo-fluid Particles for Fluid-rigid Body Coupling in SPH


    Contributors:

    Published in:

    Publication date :

    2018-08-01


    Size :

    11 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





    STABILIZATION OF A FLUID-STRUCTURE COUPLING PROCEDURE FOR RIGID BODY MOTION

    Vierendeels, J. / Dumont, K. / Dick, E. et al. | British Library Conference Proceedings | 2003


    Stabilization of a Fluid-structure Coupling Procedure for Rigid Body Motion

    Vierendeels, Jan / Dumont, Kris / Dick, Erik et al. | AIAA | 2003


    Coupling Computational Fluid Dynamics with 6DOF Rigid Body Dynamics for Unsteady, Accelerated Flow Simulations

    Ernst, Zachary J. / Hiller, Brett R. / Johnson, Chelsea L. et al. | AIAA | 2018


    FLUID HANDLING COUPLING BODY WITH LATCH

    WILHELM GRANT A | European Patent Office | 2023

    Free access