[worldsheep]

Hi everyone,

I am new to CFD and I am working on a rotating problem and investigating SRF and MRF models.

I understand the overall logic of the two methodologies, but I do not fully understand the output of the MRF model. I explain myself.

In the SRF case I am sitting on the rotor moving at constant angular speed and observe the velocity field when stationary. This is fine.

On the other hand, in the case of the MRF model I don't understand what is meant by stationary solution. As soon as there is an obstacle in the periphery that interacts with the rotor blade, the velocity field is never going to be stationary (= $$\partialu/\partialt=0$$).
Is this solution to be considered as if the rotor is frozen at a given position? (I don't think so, the solution would depend on the position of the rotor w.r.t. the stator).
I don't understand how stator-rotor interactions are interpreted in a steady state framework.

Bonus: does anyone know where I can find the full mathematical development of the MRF model plus the equations solved by the CFD software (openFoam)?
I found the equations in the link below, but it is not explained how they are used, especially at the interface.
https://openfoamwiki.net/index.php/S...RF_development