I am solving axisymmetric boundary layer developed on a rotating circular cylinder using Fluent code. In a model, I modeled only fluid domain which have inlet, outlet, no-slip and free-stream conditions. Left and right planes are given symmetric boundary condition. (homogeneous in the circumferential direction). I prepared three dimensional model with circumferential direction is homogeneous, so only two cells generated in this direction. Then I applied rotation on the wall of cylinder ( No-slip also) to give rotation.
It is necessary to used moving mesh in this solution ? The solution file is attached at a single streamwise location with different rotation rate. I think the solution is not right. How one can validate it. Expecting a quick response.
Please comment on attached velocity profile.
Thanking you in advance .
Regards,
Ramesh Bhoraniya
Why do you get a boundary layer in case of Omega=0 ? In your case, if I understood it right, there should be no flow under these circumstances, and therefore no boundary layer as well. So why do you see an almost constant U of approx. 2.2m/s in the free stream with no respect to the rotational velocity of the cylinder?
Best regards,
Dr. Th. Frank.
Dear Prof. Thomas Frank,
Thanks for your response.
I am solving boundary layer on a rotating cylinder. The image is shown for the boundary layer with the different angular velocity (omega). The image is for U velocity vs. Radius ( velocity and radius are normalized ). In case of a omega = 0; due to axial stream of flow boundary layer is developed. As the cylinder will start to rotate , the boundary layer profile will be affected.
I need help in problem setup in fluent.
Regards,
Dr. Ramesh Bhoraniya
Ramesh Bhoraniya
could you please show a clear sketch of your flow problem? I mean geometry of the computational domain and BCs. setting.
I am not sure to understand your symmetry setting...
Its a case of axisymmetric boundary layer developed on a rotating circular cylinder.
I worked on this problem not long ago but I used StarCCM+. While using moving mesh method, the solution in the region of moving mesh is smeared. So, finding velocity profiles becomes difficult. Also, mesh and solution interpolation introduces addition errors. I would recommend using wall rotation method over sliding mesh for this problem.
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