Zig-Zag maneuver simulation by CFD for a tanker like vessel

The zig-zag maneuver of a tanker like vessel has been simulated by means of the globally second order accurate finite volume solver ? navis. The aim is to stress the capability of the solver in predicting the yaw checking ability of a ship model characterized by a poor directional stability, an aspect that is usually exploited when performing zig-zag maneuvering. Numerical results have been compared to free running model tests. The effect of rudder rate and propeller modeling have been also investigated. The latter topic is crucial in order to draw the potentialities and further improvements of a simplified and computationally efficient propeller models.