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Murat Cakan October 18, 2001 08:28

Free Surface Boundary
I want to model flow around a ship hull. I do not know how to account for the free surface boundary. You may assume that the hull is positioned in an very large body of water.

Thanks in advance.

Giovanni October 18, 2001 10:29

Re: Free Surface Boundary
The problem is hard. I tried to do the same at University.

I had good result using simmetry boundary condition on a flat free surface, in a case with low Froude number.

I've not obtained good results studying free surface too.I've used Volume Of Fluid method by Hyrth,there are a large literature, see Fluent manuals first.

Now I'm trying to use Star-CD, but there are other problems calculating viscous stress and Y+.

Good luck Giovanni

Isa October 18, 2001 11:57

Re: Free Surface Boundary

I have had some trouble with the VOF method and other multi-phase in Fluent.

I will be shortly trying cfx. I have been told that it is very good on multi-phase.

There is a new free-surface model in cfx5, but I haven't tried it yet.

I will let you know how I get on!

zzr November 30, 2001 00:01

Re: Free Surface Boundary
Hi, I think you can try the VOF Model to simulate the flow around a ship's hull. I'm a novice at FLUENT,I want to model flow around a ship's hull also,but i don't know how to import the offset of the ship into GAMBIT for grid generation.Would you please help me. thanks a lot

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