Abstract
The computational experiments of a ship in oblique towing motion are conducted instead of the physical model experiments in a towing tank, which are performed from rest to steady motion through constant accelerarion motion. Solving the Navier-Stokes equations for imcompressible and unsteady flows, hydrodynamic forces acting on a ship are computed with drift angles between 0 and 90 degrees. The finite volume method is used for the Navier-Stokes equation solver using the SIMPLE algorithm on colocated grids. These computational results are in good agreement with experimental results of the physical model over the whole range of drift angles in both transitional and steady states. The 3D vortex structure and pressure distribution on the ship in transitional stages in oblique towing tests can show the characteristics of the transitional hydrodynamic forces.
