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Jan28-13, 02:07 PM
P: 13
Hi guys and girls,

I hope you can help an electronics engineer out of his place in the mechanical world

My very basic question is for a vessel holding a liquid at a given pressure and a given opening in the vessel how can i calculate exit velocity and mass flow rate? Like if i blow a balloon up to say 1 bar (good balloon huh:)) and then put a 1mm hole inside it how fast will the air be travelling as it leaves the balloon?

I dont need anything to detailed ( not worried about internal friction losses etc) and for now i can assume the vessel is fed by constant pressure mechanism i.e it wont drop pressure as it empties!

Any help gratefully recieved
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