URANS Predictions of Resistance and Motions of the KCS in Head Waves

Abstract

This paper presents a computational-fluid-dynamics framework that is focused on the prediction of resistance and motions in waves. In particular, the framework is developed to predict the performance during operation in an extreme irregular seaway. A wave-focusing technique is presented that allows for the investigation of extreme dynamical events such as heave, pitch, or water-on-deck. The body motion is solved with an unique algorithm for the six rigid-body degrees-of-freedom. Waves are generated with the waves2Foam toolbox. The solver is validated for the case of a freely heaving cylinder, the propagation of regular waves, and the added resistance and motions of the KRISO container ship (KCS) in regular and irregular waves. Results are presented for an encounter of the KCS in an extreme heave event.