Originally Posted by
Cubdriver
Sanity check: does it make sense for a flow of this type which is perhaps a carburetor venturi or a wind tunnel flow, to be going only 300 feet in an entire minute?
No, but you stated the reasons yourself ...
Originally Posted by cubdriver
Assuming constant density, incompressible speeds (<M=.3), inviscid fluids, and adiabatic flow
These assumptions would go out the window for a realistic problem, but are reasonable for these speeds and the mixture we call air.
These are modest walking speeds for most of us. And, yeah, when we're running for the flight home, even Jerry Rice and Bob Hayes (God rest his soul) would be choking on our dust!