Help with ship hull

haransys · September 8, 2016, 00:22

hello , i'm a student and need help with the simulation in fluent. Is like a ship hull but i have a problem with the simulation of two fluids the water and air, i don't know how to separate the boundary to simulate the multiphase.

Is something like in the image what i need.

I'm just learning how to use ansys so any help you can give me will be really appreciate. I need some help. Thank you very much in advance.

CFD-fellow · September 8, 2016, 02:32

Hi
For meshing:
1-You should make one meshed volume with two faces on inlet,sides and outlet.
2-You should not seperate water and air volumes in meshing.
3-Use finer mesh near the water surface.
For solver:
1-Initialize the solution with water volume fraction=1 in all places.
2-Patch the top half with water volume fraction =0

Now you have seperated water and air, then if the solver converge, it shows the waves around the hull on water surface.

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September 8, 2016, 02:32		#2
CFD-fellow Senior Member Behrooz Jamshidi Join Date: Apr 2013 Posts: 110 Rep Power: 13	Hi For meshing: 1-You should make one meshed volume with two faces on inlet,sides and outlet. 2-You should not seperate water and air volumes in meshing. 3-Use finer mesh near the water surface. For solver: 1-Initialize the solution with water volume fraction=1 in all places. 2-Patch the top half with water volume fraction =0 Now you have seperated water and air, then if the solver converge, it shows the waves around the hull on water surface.