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Journal of Enhanced Heat Transfer
IF: 0.562 5-Year IF: 0.605 SJR: 0.211 SNIP: 0.361 CiteScore™: 0.33

ISSN Print: 1065-5131
ISSN Online: 1563-5074

Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v1.i2.50
pages 157-167

Enhancement: Part II. The Role of Transition to Turbulent Flow

N. T. Obot
Department of Chemical Engineering McGill University, Montreal, Canada; Fluid Mechanics, Heat and Mass Transfer Laboratory, Department of Chemical Engineering, Clarkson University, Potsdam, New York 13699-5705
E. B. Esen
Fluid Mechanics, Heat and Mass Transfer Laboratory, Department of Chemical Engineering, Clarkson University, Potsdam, New York 13699-5705
Thomas J. Rabas
Energy Systems Division, Argonne National Laboratory, Argonne, IL USA 60439-4815; Consultant, 1015 Claremont Drive. Downers Grove, IL 60516

ABSTRACT

The role of transition in determining friction factor and nondimensional heat transfer coefficient is verified via the frictional law of corresponding states. Relationships between the friction factor and Nusselt number are developed for laminar, transitional and turbulent flow. For turbulent flow, the relation is in perfect agreement with the well known Reynolds analogy. The proposed method affords direct calculation of heat transfer coefficient in laminar, transitional and turbulent flow from the friction factor data for smooth and enhanced passages, provided values of the critical friction factor and Reynolds number are known. A general relationship is established for the critical parameters at the onset of transition.