Free Surface
 

Hi, I'm trying to get a correct wave profile along a ship hull but, although the general shape is correct, still I got a wave crest near the bow which is double than what measured in model tests.

Here is my coputational data: Ship lenght l=128 m Ship speed u=13.88 m/s Lenght scale 1:20 Domain shape: 1/4 cylinder - 1 ship lenght forward of ship bow, 2 ship lenght aft of ship stern and 1.6 ship lenght cylinder radius.

I have left 10 m of air (in full scale) above still sea surface.

Boundary conditions: similar to the one used in the tutorial "Free surface flow over a bump" with few exceptions.

Reference pressure = 1 [atm]- rho * g * z * VFWater

After few computations I noticed that I always obtain some dirt close to the lateral boundary (where it seems that an opening works better than a free slip wall) that probably affects the wave close to the hull.

Many thanks to anybody could give me a hint

Andrea