[daicui0113]

Dear friends:
in the simulation, there are three fluids:the impeller, rotor and tube.
the impeller and rotor rotate with the same speed, while the tube is stationary. the interfaces are shown in attachment:

Q1: how to set Interface 1 of Rotor and Tube ??
when setted as general connection—frozen-rotor—automatic, there exists waring:
"In Analysis 'Flow Analysis 1' - Domain Interface 'Domain Interface 1': Pitch Change option 'Automatic' is not valid if side 1 or 2 of the interface has a 360 degree or greater pitch angle, zero radius, mesh faces normal and parallel to the rotation axis, or mesh faces at the hub curve (low radial or axial position) which are thin in the radial or axial direction."

Q2: how to set Interface 2 of Rotor and Impeller, because they are both rotary ??

[ghorrocks]

I am sorry, I cannot make anything out of your image.

Why do you have two rotating domains?

[daicui0113]

Q2:the two rotating domains can be solved. but if we have two rotating domains, then how to set the interface
and how to solve the existing questions in Q1.

[ghorrocks]

I still have no idea what you are trying to do.

Does the rotor and impeller have different rotational speeds? What speeds is that? What are you modelling?

[daicui0113]

Originally Posted by ghorrocks

I still have no idea what you are trying to do.

Does the rotor and impeller have different rotational speeds? What speeds is that? What are you modelling?

now they are modeld as a whole. because their speed is same.

but to Q1, some one says modified as "none", some one says"specified ptich angle". i do not know which is ture and the difference beween them!!

[ghorrocks]

If their speed is the same then put them in the same domain.

If you do not explain what you are trying to do and what you are modelling I will ignore this thread.