Partially Rotating Grid Method for Prediction of Self-Propulsion Characteristics

Computational Fluid Dynamics (CFD) simulations based on the Finite Volume Method are often used to predict self-propulsion characteristics and to describe shippropeller interaction. Only recently, this kind of simulations has become feasible, as it requires substantial computing resources and a complete set of solver capabilities. Accurate representation of the rotating propellers and capturing of the free surface results in complexity and cost, which are still limitations for wider adoption in a preliminary design stage. Therefore, to reduce overall computational time while achieving reasonably accurate integral and local characteristics, a method using double-body model and a partially rotating grid is proposed.