Viscous Damping of Large Floating Structures

摘要

This paper presents a theoretically based method of computing the viscous contribution to motion damping due to flow separation on a large floating body with edges which are either sharp or of small curvature. The procedure is based on the assumption that for many relevant flows the vortex shedding which causes the damping is induced by oscillatory cross-flows about the long edges of the hull. The flow field is split into a potential and a rotational part. The latter is computed as a locally 2-dimensional flow field controlled by the external potential flow, either through the boundary conditions or through the convection terms.