Experimental and CFD simulation of roll motion of ship with bilge keel

Roll motion of ships and ship-like floating bodies is subject of interest since a long time. The roll motion and the related damping becomes highly unpredictable, unlike other motions. This is mainly due to the non-linear effects arising from the viscous flow around the hull and the appendages attached to it. Various roll motion mitigation devices such as U-tube tanks, active fins and bilge keel are used for stable operation of the ships. Out of these bilge keel turn out to be simple and economical roll damping devices.