[misagh]

what is the difference between unsteady profile transformation method and steady frozen rotor method? since in both of them the profiles
across the interface are stretched or compressed by the pitch-ratio.

How does profile transformation method take into account the unsteady(transient) behavior of Rotor- Stator?

thanks in advance

[Opaque]

It is probably better to separate one thing from another..

Profile transformation == profile stretching

Frozen Rotor vs Rotor Stator == Fixed Interface|Relative Configuration vs Sliding Interface|Variable Configuration

Profile stretching is applied to both interfaces. The unsteady term is always applied to the equations for transient simulations.

Hope the above helps,

[misagh]

Originally Posted by Opaque

It is probably better to separate one thing from another..

Profile transformation == profile stretching

Frozen Rotor vs Rotor Stator == Fixed Interface|Relative Configuration vs Sliding Interface|Variable Configuration

Profile stretching is applied to both interfaces. The unsteady term is always applied to the equations for transient simulations.

Hope the above helps,

Thanks for your reply.

What do you mean by "Frozen Rotor vs Rotor Stator == Fixed Interface|Relative Configuration vs Sliding Interface|Variable Configuration"
Did you mean that the transient terms in only applied to the profile transformation method?(and not to the frozen rotor or stage?)

[Opaque]

I clearly stated they are separate topics

Transient simulations always include transient terms for all equations regardless of interface type

Profile transformation always stretches the profile, and it is applied at Frozen Rotor and Rotor-stator interfaces regardless of simulation type.

Frozen rotor is an interface type where the relative position of the domains on either side of the interface is maintained FIXED.

Rotor stator is an interface type where the relative position of the domains on either side of the interface is changing as the rotor moves every time step.

Hope the above is a better version of the previous message.

[misagh]

Thanks a lot for your clarification.