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RESEARCH PAPER

Film Condensation of Saturated Vapor Over Horizontal Noncircular Tubes With Progressively Increasing Radius of Curvature Drawn in the Direction of Gravity

[+] Author and Article Information
Arijit Dutta, S. K. Som, P. K. Das

Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur

J. Heat Transfer 126(6), 906-914 (Jan 26, 2005) (9 pages) doi:10.1115/1.1798891 History: Received June 04, 2003; Revised June 24, 2004; Online January 26, 2005
Copyright © 2004 by ASME
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References

Figures

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An equiangular spiral curve generated on vertical axis: (a) symmetrical half of an equiangular spiral; and (b) symmetrical half of a polar surface.
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Different surface profiles of same surface area: (a) polar surface; (b) circular surface; and (c) elliptical surface.
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Schematic diagram of a tube with an arbitrary shape of the surface
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Variations of N̄u with (Ra/Ja)1/4 for different values of m of a polar surface
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Variations of N̄u with (Ra/Ja)1/4 for different values of m of a polar surface due to gravity only
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Variations of (N̄upolar/N̄ucircular) with m for given values of (Ra/Ja)1/4 and Nσ
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Variation of Reynolds number with θ
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Variations of local Nusselt number with x1/L for different values of m
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(ΔP/ΔPc) versus (N̄u/N̄uc) of different noncircular tubes for same value of (To−Ti)
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(ΔP/ΔPc) versus (N̄u/N̄uc) of different noncircular tubes for same value of ṁ

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