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ANSYS CFX boat hull analysis/freesurface solution (Help)

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Old   April 12, 2014, 09:38
Default ANSYS CFX boat hull analysis/freesurface solution (Help)
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Hi.

I want to calculate hull resistance in Ansys CFX. I can calculate hull resistance in Fluent but I want to try CFX.

I can set up CFX for single phase solutions.

How can I set up in CFX for multiphase solution for a boat analysis? (freesurface calculation)
(Fluid flows: Above waterline air, below waterline water)

Boundary conditions, domains, interfaces, values etc?

Can anybody help me about setting up the CFX for boat analysis?
Or is there any tutorial for my topic?
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Old   April 12, 2014, 15:28
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In ANSYS CFX 13 Tutorial 9: “Free Surface Flow Over a Bump” can be helpful.
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Old   April 13, 2014, 08:20
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Before diving into CFD do some engineering calculations by hand and try to get a rough ball park of the hull resistance. It will serve as a sanity check when you have a CFD result.

The free surface flow over a bump can be useful. But when you go multiphase you're dealing with a totally different beast. Is there a way you can do your problem single phase? I.e. just model the water?
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Old   April 13, 2014, 18:01
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Quote:
Originally Posted by RicochetJ View Post
Is there a way you can do your problem single phase? I.e. just model the water?
To calculate the wave resistance, I should set up the problem as multiphase. In Fluent, I can do it with this way. I want to do it in CFX.
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Old   April 14, 2014, 18:24
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I understood the multiphase fluid defining from bump tutorial. Thanks.
I want to try it with rigid body motion together. Namely, i want to see the motion of ship hull by itself generated wave. No external wave. I dont know this is possible. I will try to do it. Do you have suggestion/opion about this case?

Thank so much!
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