This paper shows that differences between model-scale flows and full-scale flows can have significant effects. In various projects[ds_preview], we observe that ranking of design candidates in optimization or operational conditions in trim optimization may change for model-scale and full-scale computations. The changes between model scale and full scale concern primarily the relatively different boundary layer, but also wave breaking, in particular behind transom sterns. For simulation-based design projects, full-scale analyses are thus advisable. For formal optimization, constraints in time and computational resources make a selection of chosen approach more complicated. Hybrid computing schemes, reusing CFD knowledge and meta-modelling are seen as techniques to pave the way towards using full-scale CFD also as standard option in optimization.
Authors: Karsten Hochkirch, FutureShip, Potsdam/Germany Benoit Mallol, Numeca, Brussels/Belgium
