Calculation of Unsteady Pressure by Rankine Source Method

Abstract

The rankine source method is a kind of the boundary integral equation method, and it uses a simple rankine source as a kernel of the integral equation. The rankine source method has a lot of advantages, however it also has some disadvantages which are mainly due to the numerical error. In order to overcome these disadvantages, the spline interpolation function for the free surface discretization and the second order isoparametric finite element for the hull surface discretization are applied to the rankine source method for the three dimensional unsteady free surface flow with forward speed. Some computational results, such as the hydrodynamic coefficient and the pressure distribution of three dimensional ship hull with forward speed, are verified by comparing with experimental results.