SPH for impact force and ricochet behavior of water-entry bodies

Pourya Omidvar, Omid Farghadani () and Pooyan Nikeghbali ()
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Pourya Omidvar: Faculty of Engineering, Yasouj University, Iran
Omid Farghadani: Faculty of Engineering, Yasouj University, Iran
Pooyan Nikeghbali: Absar Fars Consulting Engineering Company, Iran

International Journal of Modern Physics C (IJMPC), 2017, vol. 28, issue 10, 1-24

Abstract: The numerical modeling of fluid interaction with a bouncing body has many applications in scientific and engineering application. In this paper, the problem of water impact of a body on free-surface is investigated, where the fixed ghost boundary condition is added to the open source code SPHysics2D1 to rectify the oscillations in pressure distributions with the repulsive boundary condition. First, after introducing the methodology of SPH and the option of boundary conditions, the still water problem is simulated using two types of boundary conditions. It is shown that the fixed ghost boundary condition gives a better result for a hydrostatics pressure. Then, the dam-break problem, which is a bench mark test case in SPH, is simulated and compared with available data. In order to show the behavior of the hydrostatics forces on bodies, a fix/floating cylinder is placed on free surface looking carefully at the force and heaving profile. Finally, the impact of a body on free-surface is successfully simulated for different impact angles and velocities.

Keywords: Smoothed particle hydrodynamics; water-entry bodies; ricochet behavior; bouncing rigid body (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1142/S0129183117501194

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