Best practices for flow simulations with waves

The accuracy of flow simulations involving wave propagation and wave-body or wave-boundary interaction is affected by many parameters. In order to obtain optimal results, i.e. the highest possible accuracy for the given computing effort, the influencing parameters should be carefully selected. In this presentation the effects of the following parameters and their optimal values will be discussed:

- Temporal discretization (1st-order vs. 2nd-order fully implicit scheme)

- Grid resolution (number of cells per wavelength and wave height)

- Grid aspect ratio

Ship manoeuvrability and manoeuvring simulations

This session will present an overview of the different setups for evaluating the manoeuvrability of displacement marine vessels. It will also demonstrate the methodology used to perform so-called free running self-propelled manoeuvring simulations using a proportional control system as an autopilot. The overviews will discuss meshing, pre- and post-processing.

CFD driven drillship design

Drillships have specific features which make ship resistance and propulsion characteristics difficult to predict with simple empirical methods. In this presentation, we will show how we applied STAR-CCM+ to optimize the hull and appendages of a drillship for speed or fuel consumption. A special hydrodynamically shaped moonpool has been developed to eliminate moonpool sloshing during transit, further reducing resistance and increasing safety on board.