The onset of turbulence in a gas flowing within a circular tube occurs at Re D,c

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The onset of turbulence in a gas flowing within a circular tube occurs at ReD,c ≈ 2300, while a transition from incompressible to compressible flow occurs at a critical Mach number of Ma≈ 0.3. Determine the critical tube diameter Dc, below which incompressible turbulent flow and heat transfer cannot exist for 

(i) Air,
(ii) CO2

(iii) He. Evaluate properties at atmospheric pressure and a temperature of T = 300 K.

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Fundamentals Of Heat And Mass Transfer

ISBN: 9780470501979

7th Edition

Authors: Theodore L. Bergman, Adrienne S. Lavine, Frank P. Incropera, David P. DeWitt

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