Quick questions about Area-Velocity relation

  • Thread starter piano_girl
  • Start date
  • #1

Main Question or Discussion Point

Is it valid for real gases? My initial thought would be no, since the derivation is based on the assumption that the flow is isentropic.

Is it valid for square ducts?
 

Answers and Replies

  • #2
area velocity relation?

the continuity equation?

It can only be applied to incompressible flow, the density must remain constant.
 
  • #3
No, the area velocity relation is dA/A = (M^2 -1) dV/V
 
  • #4
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hi piano girl-
what is the M?-can u tell us about this equation more clear?,and please tell us which kind of gases this equation can be applied?-continuity equation cant be applied for the gases-its only as Mr:mybsaccownt said-for incompressible flow-and the gases is an compressible fluids-in which the density not constant.
waiting you to tell us about this equation-it might be important,thanks .
 
Last edited:
  • #5
FredGarvin
Science Advisor
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