Numerical simulation of turbulent free surface flow around a self-propelled ship

Abstract

The turbulent free surface flow around a self-propelled KRISO 138 K LNG Carrier was simulated using the finite volume based multi-block RANS code, WAVIS developed at KRISO. The k-ε turbulence model with a wall function was used for the turbulence closure. The free surface was captured with the Level-Set method and body forces were used to model the effects of propeller without resolving the detail blade flow. To obtain an accurate free surface solution and stable convergence, the computations were conducted with a proper fine grid refinement around the free surface and with an adoption of implicit discretization scheme for the Level-set formulation. More grid points on the free surface area were recommended to capture close wave patterns to the experiment. This is an abstract of a paper presented at the 15th International Offshore and Polar Engineering Conference (Seoul, Korea 6/19-24/2005).