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Reynolds analogy relates turbulent momentum and heat transfer. The main assumption is that heat flux q/A in a turbulent system is analogous to momentum flux τ, which suggests that the ratio τ/(q/A) must be constant for all radial positions.
Additional recommended knowledge
The complete Reynolds analogy* is,
(f/2) = (h/Cp*G) = (k'c/Vav)
Experimental data for gas streams agree approximately with above equation is the Schmidt and Prandtl numbers are near 1.0 and only skin friction is present in flow past a flat plate or inside a pipe. When liquids are present and/or form drag is present, the analogy is not valid.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Reynolds_analogy". A list of authors is available in Wikipedia.|