Numerical Calculations of Ship Induced Waves

Nowadays, various numerical methods are developed to extend computational fluid dynamics in engineering applications. One of the most useful methods in free surface modeling is Boundary Element Method (BEM). BEM is used to model inviscid fluid flow such as flow around ships. BEM solutions employ surface mesh at all of the boundaries. In order to model the linear free surface, BEM can be modified to a simple form called Green Function Method (GFM). In this paper a developed code is applied GFM to several problems including flows around ships and the results are presented. To verify the accuracy and application of the code, it is applied to flows around an analytically body which is Wigley hull and results are in good agreement with available data. The wave-making properties are also investigated. Variations of the wave pattern versus the speed are studied, and a quantitative investigation of the forces is performed. In addition, the effects of linear solution are studied. Presented results and computer code can be used to optimize the hull forms for decreasing wave making resistance.