Almost all maritime hydrodynamic problems involve multi-phase flows. Free-surface, waves and cavitating flows are the most obvious cases, and have been dealt with in the last years. But also mud, bubbles, multi-species, associated phase change and compressibility effects are nowadays important. This sub-programme intends to develop CFD capabilities in this field.

During operations of maritime structures under realistic conditions often the interaction of several independent objects cannot be neglected. Moreover, frequently there are parts of the structures which are flexible, with deformations influenced and influencing the surrounding flow field. In this sub-programme capabilities to simulate these situations are developed.

Turbulence modelling is one of the pillars of any viscous-flow CFD calculation. Loads, flow fields and acoustic behaviour of any maritime structure are very much dependent on the accuracy and fidelity of the turbulence models used. In this sub-programme several turbulence (RANS, SRS, LES, PANS approaches) and acoustic modelling related issues (FW-H, coupled approaches) are investigated, verified and validated.

This sub-programme deals with all background developments on the core of the CFD codes. This includes spatial and time discretisation, algorithms, iterative solvers, parallelisation techniques and its relation with high-performance computing (HPC) hardware platforms, both current (CPU-mainly) and forthcoming ones (CPU, GPUs, Heterogeneous). This sub-programme intends consequently to make the CFD tools more robust, more accurate and more efficient (faster).

This sub-programme deals with developments on the complete CFD process chain, in order to make any analysis more efficient and more accurate (less human and numerical errors). This includes: geometry preparation and automatic adaptation (also for optimization); automatic grid generation (structured and unstructured grids); preparation and monitoring of calculations; flow visualization (during calculation and as post-processing); estimation of associated numerical uncertainties.