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Old   July 1, 2009, 22:01
Question Simulates the rotating ball
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Hello everyones,

I'm a new member. I'm learning Star-CCM. Now I want to simulate a ball rotating in fluid, using turbulence flow. But I don't know how to do it. Can you help me?

Another question is: I want to simulate a turbulence fow past an airfoil (likes NACA XXXX) but I don't now how to do it. Please show me what I have to do?

Thanks!
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Old   July 6, 2009, 12:24
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For simulation of a turbulent flow over an airfoil simply follow the tutorials in STAR CCM+ which shows the flow over a bluff body. I guess this is the
very first tutorial if you go from the help menu.

For rotational velocity specification, go under the specified boundary go to Physics Conditions -> Tangential Velocity Specification -> Method and select Rotational Rate.

hope this helps.
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Old   July 6, 2009, 12:51
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Thanks Vishyaroon! My problem is how to generate a good mesh for NACA section? can you show me what kind of mesher and what are the setting values for this simulation?
Thanks alot!
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Old   July 6, 2009, 15:12
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Meshing an airfoil will depend on the turbulence model you choose to work with. You may want to look into the details of the turbulence model and the near wall y+ it requires (this varies from model to model) for generating the mesh.
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