I want to make a compressible flow simulation. The fluid that used in simulation is air. In real, i can measure the inlet condition of that flow. The air flowrate of air at the inlet 15000 m^3/h and the pressure of air is 16 barG. I wonder is there a way to define these two inlet condition in the same simulation. Before write this topic, i tried to make a simulation by defining only one inlet condition. I selected velocity inlet as inlet boundary condition. Then, when i observe the results, i realized that the pressure at the inlet is less than the real condition. So is there anyone who has a suggestion for me about this.