NONLINEAR FREE-SURFACE FLOW COMPUTATIONS FOR SUBMERGED CYLINDERS

A numerical method involving isolated sources located outside the flow domain is used to compute potential flows in two dimensions involving the nonlinear water-wave boundary condition. The method is tested on Stokes waves, and then used on steady streaming flows about submerged cylinders. The circular cylinder with and without circulation is discu ssed for a range of submergences and Froude numbers. Emphasis is place d on the special choices of circulation for which the net vertical for ce is small and the amplitude of downstream waves is reduced.