Computation of Free-Surface Viscous Flows around Self-propelled Ships with the Help of Sliding Grids

Accurate prediction for a self-propelled ship is a challenging task for CFD computation. While turbulence modeling is a crucial issue, more physical modeling is involved in a propeller simulation: transition, cavitation, turbulence, ventilation, etc. More advanced numerical technique is also required to capture very small scale flow motion such as tip vortex. The ISIS-CFD RANSE code has been fully validated for resistance and wake flow prediction using advanced turbulence modeling. An adaptive mesh refinement technique with different refinement is available and a sliding grid approach is recently implemented. This paper is devoted to the validation of the ISIS-CFD code for self propulsion computation. The test case chosen is the well known KCS test case proposed for the Tokyo 2005 and Gothenburg 2010 workshop.