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For ideal gas (good assumption for the mixture of the gas leaving the cavity).
Mach number determine the characteristic of flow in the vent system where
the air/gas velocity is reaching to the speed of sound.
The air is chocked at the vent exit and in some cases other locations as well
for vacuum venting.
In atmospheric venting the flow is not chocked for large portion of the process.
Moreover, the flow, in well design vent system, is not chocked.
Yet the air velocity is large enough so that
the Mach number has to be taken into account for reasonable calculation of the .
Genick Bar-Meir ||| www.potto.org
copyright Dec , 2006
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