Bernoulli's equation as I understand it is an expression (or possibly a consequence) of conservation of energy in an incompressible fluid flow.(adsbygoogle = window.adsbygoogle || []).push({});

My question is: how can the "standard" Bernoulli's equation ever apply to an ideal gas?

Wikipedia gives a different version of Bernoulli's equation for a compressible fluid, which assumes adiabatic compression and has a coefficient with some gammas in front of the pressure term. Shouldn't this version always apply to an ideal gas fluid, and not the standard equation?

I understand that there are arguments that an ideal fluid basically doesn't significantly compress if it's significantly subsonic, but I don't see how these arguments affect the equation of state of the fluid, which is what tells us how the internal energy of the gas behaves.

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# Applicability of Bernoulli's principle to ideal gases

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