[Newtonian]

Hello,

I am trying to do a simulation with a rotating blade in atmospheric conditions where all flow is induced by the MRF rotation, hence I do not want to assign any velocity.

I am wanting to use a single boundary that serves as both the inlet and outlet, so that flow can go both ways across the boundary. What velocity BC should I use for the boundary?

I've been struggling with this for awhile, and I believe I cannot use inletOutlet, outletInlet, pressureInletOutletVelocity because I do not know the velocity at the boundary (I want it to be computed from the pressure).