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NUMERICAL SIMULATIONS OF FULLY NONLINEAR WAVE MOTIONS IN A DIGITAL WAVE TANK  

Park, J.C. (부산대학교 조선해양공학과)
Kim, K.S. (부산대학교 조선해양공학과)
Publication Information
Journal of computational fluids engineering / v.11, no.4, 2006 , pp. 90-100 More about this Journal
Abstract
A digital wave tank (DWT) simulation technique has been developed by authors to investigate the interactions of fully nonlinear waves with 3D marine structures. A finite-difference/volume method and a modified marker-and-cell (MAC) algorithm have been used, which are based on the Navier-Stokes (NS) and continuity equations. The fully nonlinear kinematic free-surface condition is implemented by the marker-density function (MDF) technique or the Level-Set (LS) technique developed for one or two fluid layers. In this paper, some applications for various engineering problems with free-surface are introduced and discussed. It includes numerical simulation of marine environments by simulation equipments, fully nonlinear wave motions around offshore structures, nonlinear ship waves, ship motions in waves and marine flow simulation with free-surface. From the presented simulations, it seems that the developed DWT simulation technique can handle various engineering problems with free-surface and reliably predict hydrodynamic features due to the fully-nonlinear wave motions interacting with such marine structures.
Keywords
Digital wave tank (DWT); Nonlinear wave motions; Wavier-Stokes (N-S) equation; Ship equation simulation; Numerical wavemaker; Wave-structure interaction;
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