The effect of wall suction on turbulent flow in a tube is analyzed, using a mixing-length model with an extended form of van Driest’s damping factor. It is shown that an empirical damping factor similar to that proposed by Kays, Moffat, and Thielbahr, when incorporated in a method of solution developed by Kinney and Sparrow, predicts that the turbulence level in tube flow decreases with suction, and yields excellent correlation with the experiments of Weissberg and Berman.

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