rotatingWallVelocity normal to wall
I am working in a simulation with dynamic mesh. But, previously, I wanted to make the stationary simulation. A wall is rotating, and I wonder if I could use the rotatingWallVelocity. I tried with pimpleFoam, and the results are not correct (very high velocities in some cells, near to the rotating wall). Even with potential Foam, it gives velocity zero (no wall velocity?) around the domain, except on the wall.
I checked the rotatingWallVelocity BC source and I found that:
// Remove the component of Up normal to the wall
// just in case it is not exactly circular
const vectorField n(patch().nf());
vectorField::operator=(Up - n*(n & Up));
Does it mean that only the tangencial wall velocity is considered for the fluid motion? Why? Anyway, I will try to remove this constraint, and I see what happens... but I would like to know the reason of that.
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