Learning Forum

[Fretz Sil]

Hello.

I am trying to simulate a rotating channel. It has an inlet and an outlet and the bottom wall is heat flux. The channel is rotated with respect to a certain axis as shown in the figure. I have validated the result in stationary conditions but the problem arises when I try to match the rotational data (I used reference frame motion in cell zone condition). They just dont make sense. I wanted to know how to approach this certain problem in case of rotation. Do I use CFX or Fluent ?

Thank you.

[Rob]

What's driving the flow? Both Fluent and CFX have options for moving mesh and reference frame, but I'm not sure what you're wanting to actually model. 

[Fretz Sil]

Its actually a channel used for turbine blade internal cooling and I am trying to validate a paper's experimental data. For all I know, the channel has one velocity inlet and a pressure outlet and its rotating about an axis.

[Rob]

You may be OK with Fluent's reference frame then. But if the whole channel is moving will it influence the flow? If not does it need to move?

[Fretz Sil]

Yes. It will influence the flow inside. The Coriolis force and centrifugal force should influence the flow due to the rotation. I enabled the frame motion in FLUENT as seen in the figure. But it didn't work. 

[Rob]

Ah, you may want to model the whole domain and include some up and downstream space.