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TECHNICAL BRIEFS

Heat Transfer for Laminar Flow in Spiral Ducts of Rectangular Cross Section

[+] Author and Article Information
Michael W. Egner, Louis C. Burmeister

Department of Mechanical Engineering, University of Kansas, 1530 W. 15th St., Lawrence, KS 66045

J. Heat Transfer 127(3), 352-356 (Mar 24, 2005) (5 pages) doi:10.1115/1.1857950 History: Received January 05, 2004; Revised December 13, 2004; Online March 24, 2005
Copyright © 2005 by ASME
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References

Figures

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Zone locations in the spiral duct
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Secondary flow streamlines for spiraling-outward flow at the 1080 deg slice plane: (a) γ=8, Re=100; (b) γ=8, Re=500. Only the upper half of the duct cross section is shown above the symmetry plane
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Stability diagram in the Dean-number–curvature-ratio plane for curved and spiral ducts for outward-spiraling flow (adapted from 23)
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Variation of the peripherally averaged local Nusselt number for outward-spiraling flow with Dean number for γ=8, Pr=0.7 and 5, and Re=100, 300, and 500
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Variation of local Nusselt number with streamwise distance along the centerline for γ=8 and spiraling-outward flow
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Comparison of present correlations for average Nusselt number (Pr=0.7) versus average Dean number with those of previous studies (boundary conditions: H1 is constant axial wall heat flux and constant peripheral wall temperature, H2 is constant axial wall heat flux and constant peripheral wall heat flux)

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