Simulates the rotating ball

nvtrieu · July 1, 2009, 23:01

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!

vishyaroon · July 6, 2009, 13:24

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.

nvtrieu · July 6, 2009, 13:51

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!

vishyaroon · July 6, 2009, 16:12

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.

July 1, 2009, 23:01	Simulates the rotating ball	#1
nvtrieu Member Join Date: Jul 2009 Posts: 70 Rep Power: 17	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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July 6, 2009, 13:24		#2
vishyaroon Senior Member Aroon Join Date: Apr 2009 Location: Racine WI Posts: 148 Rep Power: 17	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.

July 6, 2009, 13:51		#3
nvtrieu Member Join Date: Jul 2009 Posts: 70 Rep Power: 17	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!

July 6, 2009, 16:12		#4
vishyaroon Senior Member Aroon Join Date: Apr 2009 Location: Racine WI Posts: 148 Rep Power: 17	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.