case check doubt

nycera

Hi, hi modeling a stirred tank with rushton turbine. I' using sliding mesh, and I turned to it via the mrf-to-sliding-mesh TUI command.

I've got an inner moving cylindrical zone surrounding the impeller and another outer stationary zone. I've set the impeller stationary relative to the adiacent cell zone, the tank wall stationary, the shaft coming out of the moving zone rotating with an absolute speed equal to the moving zone, and the outer cell zone stationary, obviously.

When I run the case check I get this reccomandation:

"Review wall motion. Stationary wall motion relative to adjacent zone detected (Define/Boundary Conditions)"

I don't quite get it.