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4) In HVAC practice, one needs ' six pipe-diameters' ( tire width ) distance downstream of an 'obstruction'( tire ) in order for the streamlines to recover.
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Sounds excessive, a six inch tire would need a three foot tail. HVAC is an inverse case. Mair found an l/d of 1.0 gets 80% of the maximum.
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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.Because much of what is in the published literature is nonsense,
and much of what isn’t nonsense is not in the scientific literature.
-- Sabine Hossenfelder
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