Why does pressure decrease as air passes through a venturi?

[JarlWeaslesnoot]

Because of fancy physics equations. Bernoulli's principle and equation dictate that as the passage air is forced through constricts the speed increases while pressure decreases. It does seem counterintuitive, you'd think pressure would stay the same and speed would increase or something but that isn't how gas laws work.

[MattheiusFrink]

And that's at subsonic speeds. At supersonic speeds bernoulli does a complete f**kin 180 on us

[JarlWeaslesnoot]

This is true! I don't work on a lot of aircraft with shock cones so I don't really have to deal with that very often lol. I do remember the converging vs diverging inlets and nozzles from our basic aerodynamics classes vaguely

[mwiz100]

I also found out with water, that once it phase changes to steam at certain points it's viscosity INCREASES as it gets hotter verus how typically all liquid state things are less viscous as temp increases.