How to define the boundary conditions for oscillatory flow in COMSOL?

Hi

I want to model an oscillatory flow passing fins inside a resonator.

I need to define both of the velocity and pressure boundary conditions at the inlet (x1) and the outlet (x2) of the computational domain.

The boundary conditions are given as:
p1 (x,t)= po cos (k' x1 ) cos⁡(ωt)

ua1= po/(ρm c) sin⁡(k' x1 )

p2 (x,t)= po cos⁡ (k' x2 ) cos⁡(ωt)

ua2= po/(ρm c) sin⁡(k' x2 )

∂T/∂x = 0 at x1 and x2

Could anybody assist me, please?

Thanks
Muyassar