Pressure at exit plane of pipe: static or total

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SUMMARY

The discussion centers on the pressure conditions at the exit plane of a pipe discharging into the atmosphere at a low Mach number of 0.05. It is established that at the exit plane, the static pressure equals atmospheric pressure (P_atm). In contrast, total pressure at this point comprises static pressure plus dynamic pressure, indicating that total pressure exceeds P_atm due to the presence of dynamic effects from the flow.

PREREQUISITES
  • Understanding of fluid dynamics principles
  • Knowledge of pressure concepts: static and total pressure
  • Familiarity with Mach number and its implications
  • Basic concepts of flow exiting a pipe
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  • Research the relationship between static and dynamic pressure in fluid systems
  • Learn about pressure measurement techniques in pipe flow
  • Study the effects of Mach number on pressure distribution
  • Explore computational fluid dynamics (CFD) simulations for pipe flow analysis
USEFUL FOR

Engineers, fluid dynamics researchers, and anyone involved in the design and analysis of piping systems will benefit from this discussion.

willgoat
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Hi all, hope i can get some opinions here on a topic discussed at work. Flow is exiting a pipe from a chamber at P_in to outside/atmospheric with pressure patm, at say low mach number 0.05.

At the exact exit plane of the pipe, is the total pressure equal to the patm, or will it instead be the static pressure which is equal to patm? I hope i explain the query well enough. thanks.
 
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It will be static pressure that is equal to Patm. Total pressure will be Patm plus dynamic.
 

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