Abstract
A numerical prediction method has been developed for threedimensional flows having oscillating free-surfaces. On the basis of the arbitrary Lagrangian Eulerian (ALE) method, the profiles of freesurfaces are represented by three-dimensional body-fitted coordinates, which are regenerated in each computational step using cubic spline functions. Navier-Stokes equations are discretized on a Lagrangian scheme in the transformed space with sufficient numerical accuracy. The present computational technique has been applied to threedimensional non-linear sloshing in a cylindrical tank. As a result, it is concluded that the reasonable numerical results are obtained by the present method.
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