Iam working on a fire hydrant valve where I have to calculate
1.the outlet pressure( Max Limit is 4.5 bar) for a given Inlet pressure varying from 5 bar to 20 bar. In this case how I can give Boundary conditions? I have tried with Velocity Inlet and pressure outlet but I want to calculate for Varying Inlet pressure.?
2. Have to calculate the force actingin the piston( Top & Bottom). How CAn I calculate? I have attached a picture for your reference.