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Wish I knew what that last sentence was talking about. I was intrigued to see in a film how a smooth bell mouth could push the onset of turblence into very high Reynolds numbers. I heard it was due to the instabilities of the incoming fluid. That is, if it enters the fluid nice and smoothly without a large stagnation point it would not start tumbling.
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1971 911S, 2.7RS spec MFI engine, suspension mods, lightened
Suspension by Rebel Racing, Serviced by TLG Auto, Brakes by PMB Performance
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