SIMULATION OF FREE SURFACE WAVE PATTERN DUE TO THE MOVING BODIES

Abstract– Steady three-dimensional free surface waves generated by three dimensional movingbodies are presented. By applying Green’s theorem and the Green function method, an integralequation for the perturbation velocity potential is obtained based on the potential flow theory. Themethod uses constant-strength doublet and source density distribution over the foil body surfaceand Neumann-type condition. On the undisturbed free surface source density is applied to satisfythe free surface condition that is defined by the first and second order solutions. After solving thedoublet on the body and source on the free surface, the computational results of pressure, lift, wavedrag, wave pattern and wave elevation can be calculated at various Froude numbers. The resultsfor the surface piercing (such as strut and Wigley hull) and submerged moving hydrofoils havebeen presented. The validity of the numerical results is examined by comparing it with theexperimental results.