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Old 08-12-2020, 02:01 PM   #745 (permalink)
aerohead
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energy/ entropy

Quote:
Originally Posted by freebeard View Post
You misspelled entropy.
I believe that the use of potential 'energy' is correct usage, as it's contextually consistent with the Bernoulli Principle of equipotential energy of the flow environment.
By displacing the air, the passage of the car through the troposphere, potential energy of static pressure is converted to kinetic energy of velocity (as per the Bernoullu Equation) and all but surface-friction drag heating of the air ( unavoidable) can,potentially be recovered as pressure, if the the car is 'streamlined.'
The degree of body mutilation and 'non-streamlined' shape would directly affect ' entropy', as any flow lost to flow separation and turbulence is, by definition, direct heating of the troposphere through viscous attrition, an irreversible energy loss.
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