Ansys Fluent: Pulsating Air Injection Into Water, Transient Boundary Condition Without UDF

In this video i show how to simulate air injection into water. The air is being injected once every 2 seconds with a variable velocity. This boundary condition could very well be implemented with a UDF, but i choose to do it with an expression defined directly in the setup, for the sake of simplicity. Ansys Fluent, Multiphase Flow, Without UDF.