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Nozzle Sizing Calculation

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#26 astro


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Posted 15 June 2024 - 11:32 PM

Another very useful point of reference are the series of papers by Mark Bothamley:


Quantifying Gas/Liquid Separation Performance, Parts 1, 2 and 3


Various inlet device type ρν² criteria are listed in Table 4 of Part 1 that are roughly similar to the data listed in GPSA as per comments above at:


#27 astro


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Posted 15 June 2024 - 11:57 PM

Greetings everyone. Can anyone explain to me the physical significance of "Density x Velocity^2" term? What does it actually mean and what is it called? Few places it is referred as momentum flux, is there any other term for it? Thank you for your time. 




On youtube, search for Momentum flux equation with application.

This tutorial should help you.


Excellent tip Breizh - I find the loose use of "momentum" confusing because I can't help apply undergrad dimensional analysis and the term simply doesn't stack up when I apply basic arithmetic.


"Momentum flux" makes dimensional sense and is consistent with the theory you point to (the tutorial from Djordje Romanic was a handy refresher).


GPSA uses "velocity head" for momentum flux that is also equivalent to "dynamic pressure", as noted by Bothamley.

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