Overset rotating domain
 

Hi everyone!

I am simulating 2 propellers with overset mesh. I have a mesh for each prop and a background box mesh.
When I simulate only one prop, I have good quality of the solution, when I simulate both I have this kind of bad resolution.
Could you please help me? Do you know if I have to set something else? My turbulence model + near wall treatment is compatible with my case (the results I am having with the single propeller confirm that).

Maybe I have to set something else?
Thank you in advance!
E.Ghttps://ibb.co/n0pWMg1

Please post any evidence for "bad resolution"?. Are you referring to convergence issues due to mesh?.

The convergence is ok and even the thrust and power report files are what I expected, but then when I display contour of velocity field, for example, I have this kind of field (image attached). It is just where I have the other mesh appended.
I have a perfect field when I simulate with the same meshes only one propeller. In this case I have 2 meshes, one for each propeller , which overset each other, and then the background box.