A viscous liquid is sheared between two parallel disks; the upper disk rotates and the lower one is fixed. The velocity field between the disks is given by \(\vec{V}=\hat{e}_{\theta} r \omega z / h\). (The origin of coordinates is located at the center of the lower disk; the upper disk is located at \(z=h\).) What are the dimensions of this velocity field? Does this velocity field satisfy appropriate physical boundary conditions? What are they?