Bernoulli's theorem of conservation in a nozzle spraying to atmosphere

AI Thread Summary
Bernoulli's theorem can be applied to the scenario of water flowing from a pump through a pipe and out of a nozzle. The pressure gauge in the pipe measures the pressure before the nozzle, while the nozzle's outlet pressure is typically atmospheric pressure. According to Bernoulli's principle, the pressure at the nozzle outlet is considered zero gauge pressure because it is exposed to the atmosphere. The working example referenced indicates that the pressure at the outlet is zero due to the conversion of pressure energy into kinetic energy as the fluid exits the nozzle. Understanding this relationship is key to applying Bernoulli's theorem correctly in fluid dynamics.
Michael V
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Hi there, I'm having a problem behind the theory of bernoulli's theorem. Can it be applied in an application where water flows from a pump into a pipe with x diameter and out of a nozzle with y diameter to atmosphere. There is a pressure gauge on said pipe. There is a nozzle screwed into this pipe with no pressure gauge on it.

Is the gauge pressure at the nozzle atmospheric pressure, 0 or is it what can be calculated using bernoulli's theorem of conservation of energy?
 

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Ive just found this worked example. It says that the pressure at the outlet is 0. Why is this?
 

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