Turbulent fluid-structure interaction of water-entry/exit of a rotating circular cylinder using SPH method

Jafar Ghazanfarian (), Roozbeh Saghatchi and Mofid Gorji-Bandpy
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Jafar Ghazanfarian: Department of Mechanical Engineering, Faculty of Engineering, University of Zanjan, University Blvd. 45371-38791, Zanjan, Iran
Roozbeh Saghatchi: Mechanical Engineering Department, Amirkabir University of Technology Address, Tehran, Iran
Mofid Gorji-Bandpy: Department of Mechanical Engineering, Babol University of Technology, Babol, Iran

International Journal of Modern Physics C (IJMPC), 2015, vol. 26, issue 08, 1-20

Abstract: This paper studies the two-dimensional (2D) water-entry and exit of a rotating circular cylinder using the Sub-Particle Scale (SPS) turbulence model of a Lagrangian particle-based Smoothed-Particle Hydrodynamics (SPH) method. The full Navier–Stokes (NS) equations along with the continuity have been solved as the governing equations of the problem. The accuracy of the numerical code is verified using the case of water-entry and exit of a nonrotating circular cylinder. The numerical simulations of water-entry and exit of the rotating circular cylinder are performed at Froude numbers of 2, 5, 8, and specific gravities of 0.25, 0.5, 0.75, 1, 1.75, rotating at the dimensionless rates of 0, 0.25, 0.5, 0.75. The effect of governing parameters and vortex shedding behind the cylinder on the trajectory curves, velocity components in the flow field, and the deformation of free surface for both cases have been investigated in detail. It is seen that the rotation has a great effect on the curvature of the trajectory path and velocity components in water-entry and exit cases due to the interaction of imposed lift and drag forces with the inertia force.

Keywords: Rotating circular cylinder; smoothed-particle hydrodynamics method; turbulence modeling; water-entry and exit; fluid-structure interaction; 66.70.-f; 44.05.+e; 44.10.+i (search for similar items in EconPapers)
Date: 2015
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DOI: 10.1142/S0129183115500886

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