The present study numerically models the interaction between a regular wave and the roll motion of a rectangular floating structure. In order to simulate two-dimensional incompressible viscous two-phase flow in a numerical wave tank with the rectangular floating structure, the present study used the volume of fluid method based on the finite volume method. The sliding mesh technique is adopted to handle the motion of the rectangular floating structure induced by fluid-structure interaction. The effect of the wave period on the flow, roll motion and forces acting on the structure is examined by considering three different wave periods. The time variations of the wave height and the roll motion of the rectangular structure are in good agreement with experimental results for all wave periods. The present response amplitude operator is in good agreement with experimental results with the linear potential theory. The present numerical results effectively represent the entire process of vortex generation and evolution described by the experimental results. The longer wave period showed a different mechanism of the vortex evolution near each bottom corner of the structure compared to cases of shorter wave periods. In addition, the x-directional and z-directional forces acting on the structure are analyzed.
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Chen H.C. Liu T. Chang K.A. and Huang E.T. 2002. Time-domain simulation of barge capsizing by a Chimera Domain Decomposition Approach. Proceedings of the 12th International Offshore and Polar Engineering Conference.Kitakyushu Japan 26-31 May 2002 pp.26-31.
Downie M.J. Bearman P.W. and Graham J.M.R. 1988. Effect of vortex shedding on the coupled roll response of bodies in waves. Journal of fluid mechanics 189 pp.243-261.
Faltinsen O.M. and Pettersen B. 1987. Application of a vortex tracking method to separated flow around marine structures.Journal of Fluids and Structures 1(2) pp.217-237.
FLUENT 2010. ANSYS FLUENT user’s guide. Canonsburg USA: ANSYS Inc.
Himeno Y. 1981. Prediction of ship roll damping-state of the art Rep no. 239: Department of Naval Architecture University of Michigan Michigan.
Hirt C.W. and Nichols B.D. 1981. Volume of fluid (VOF) method for the dynamics of free boundaries. Journal of Computational Physics 39 pp.201-225.
Ikeda Y. and Himeno Y. 1981. Calculation of vortex-shedding flow around oscillating circular and Lewis-form cylinder.Proceedings of the 3rd International Conference on Numerical Ship Hydrodynamics. Paris France 16-19 June 1981.
Jung K.H. Chang K.A. and Huang E.T. 2004a. Two-dimensional flow characteristics of wave interactions with a fixed rectangular structure. Ocean Engineering 31 pp.975-998.
Jung K.H. 2004b. Experimental study on rectangular barge in beam sea. Ph.D. Texas A&M University.
Jung K.H. Chang K.A. and Huang E.T. 2005. Two-dimensional flow characteristics of wave interactions with a free-rolling rectangular structure. Ocean Engineering 32(1) pp.1-20.
Korpus R.A. and Falzarano J.M. 1997. Prediction of viscous ship roll damping by unsteady Navier-Stokes techniques.Journal of Offshore Mechanics and Arctic Engineering Transactions of the ASME 119(2) pp.108-113.
Launder B.E. and Spalding D.B. 1972. Lectures in mathematical models of turbulence. London England: Academic Press.
Salvesen N. Tuck E.O. and Faltinsen O.M. 1970. Ship motions and sea loads. Transactions of SNAME 78 pp.250-287.
Sarkar T. and Vassalos D.A. 2000. A RANS-based technique for simulation of the flow near a rolling cylinder at the free surface. Journal of Marine Science and Technology 5 pp.66-77.
Scolan Y.M. and Faltinsen O.M. 1994. Numerical studies of separated flow from bodies with sharp corners by the vortex in cell method. Journal of Fluids and Structures 8(2) pp.201-230.
Wehausen J.V. 1971. The motion of floating bodies. The Annual Review of Fluid Mechanics 3 pp.237-268.
Wilson R.V. Carrica P.M. and Stern F. 2006. Unsteady RANS method for ship motions with application to roll for a surface combatant. Computers and Fluids 35(5) pp.501-524.
Yeung R.W. and Vaidhyanathan M. 1994. Highly separated flows near a free surface. Proceedings of the International Conference on Hydrodynamics. Wuxi China 30 October - 3 November 1994.