[QuentinB]

Hello every one !

For my master thesis, I'm trying to model a 2D rotating flow. Goal : Streamlines parallel to the geometry (circular) (cfr. figures).
It is first experience on CFD so I do my best. I'm working with a student licence so I do not have access to the ANSYS training.

I was think about a single reference frame model.
Simple mapped face meshing (cfr.figures). I don't know how to configure the axis (of rotation) of the axisymetric model. I just put my global coordinate system as my wished center of rotation. But when I "Check case...", It recommend me to "translate the mesh for axisymmetric geometry containing nodes below the x-axis."
How to create and define an axis of rotation ?

Setup :
- I choose K-e viscous model and Enhanced wall treatment.
- Cell Zone conditions : frame motion of the geometry zone (Rotational velocity 50 rad/s)

I think that my problem is to configure my boundary conditions :
What are your advises for the inlet ? I was thinking about only configure it as "Velocity-inlet" type with only a swirl angular velocity of 50 ras/s to follow the frame motion. I want that the flow

For the solution methods, I use "Couple - Presto ! - First order upwind for all and check Pseudo Transient" as recommended.

But when I initialize the solution "convergence tolerance of 1-06 not reached".

Several problems on my setup I think. Any advises will be very helpful !
I didn't see other subject with real solution about that kind of model...

Thanks you in advance !

[QuentinB]

How to create an axis ? In the Design Modeler or Meshing ?