[gendes]

Dear people,
I am a Master student and I am using CFX for my Master Thesis. Actually I have some problems and I hope someone could help me.
My profile is a turbine blade from a cascade and I have to simulate the effects of an eventual rotation. I am applying a linear velocity (computed as omega*r) in -Y but it doesn't work on the lateral sides (they are an interface with translational periodicity + nonoverlap condition for imposing the velocity).
From the post processing I can see the velocity vectors, and I have no problems with airfoil, upper wall and lower wall, but with interfaces. How can apply a linear velocity on a stationary profile?
Moreover, for replacing the centrifugal force, I was thinking to apply bouyancy along +Z.
(Ansys CFX 18.0)
What to you think? Have you got any suggestions for me? What about the Coriolis force?
Thank you in advance to everyone

[Opaque]

You must locate the passage away from an axis, and use Rotational Periodicity.

Since the Rmax/Rmin ~ 1, the solution is effectively the linear cascade solution

[gendes]

Thank you Opaque,
I tried to apply a rotation with rotational periodicity but the simuation collapses, and I think is for the linear design of the model

[Opaque]

Have seen the approach used ten of times. The problem is elsewhere.

Start small,
1 - Set it up with angular velocity = 0
2 - Increase the value and see if your setup makes sense
3 - Approach the intended velocity

[gendes]

Thank you.
But what if I would maintain the linear approch? How could I simulate the rotation effect, applying a linear velocity, as tangential one, computed as omega*r? And at this point, how could I simulate coriolis and Crentrifugal acceleration?

[Opaque]

If you want to go with the linear approach, you must write your mathematical model for a non-inertial frame, then identify the missing terms in the equations compared to the default model.

Those missing terms can be added as sources using sub-domains.

If you have a single cascade, there should be no issue with sliding interfaces and you should be good.