These might seem like dumb questions but they have been confusing me for some time now and any help will be greatly appreciated.
1. So you have this closed vessel at atmospheric pressure, or round about. The inlet to the vessel is from the discharge of a pump which pumps liquid at, say, 140 psi. The drain and vents are all closed and there isn't any other outlet. Now, you start pumping the liquid. The pressure of the liquid is 140 psi. When it enters the vessel, what happens? Will the pressure of the vessel increase? How does it increase? Does some of the liquid flash into vapor , resulting in the increase of pressure of the vessel? If so, suppose you fill the tank halfway and then stop the pump and close all inlets and outlets. What will be the pressure of the vessel now? 140 psi or will it be lower than that?
2. Now , suppose you don't stop the pump and let the tank fill. You don't stop even when the tank is full. You try to continue pumping. Does the pressure in the vessel increase beyond 140 psi, the design discharge pressure of the pump? Or it cannot be increased beyond this 140 psi? Basically , is there a pressure increase due to buildup even beyond the rated discharge of the pump? If there is no pressure buildup , then what exactly happens as you continue to try to pump the liquid into the vessel? Is there backflow?
Thank You.