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TECHNICAL PAPERS: Forced Convection

A Numerical Study of Flow and Heat Transfer in a Smooth and Ribbed U-Duct With and Without Rotation

[+] Author and Article Information
Y.-L. Lin, T. I.-P. Shih

Department of Mechanical Engineering, Michigan State University, East Lansing, MI 48824-1226

M. A. Stephens

Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213-3890

M. K. Chyu

Department of Mechanical Engineering, University of Pittsburgh, Pittsburgh, PA 15261

J. Heat Transfer 123(2), 219-232 (Sep 25, 2000) (14 pages) doi:10.1115/1.1345888 History: Received April 28, 1999; Revised September 25, 2000
Copyright © 2001 by ASME
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References

Figures

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Schematic of problem studied
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Schematic of rib geometry
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Grid systems used for smooth and ribbed U-duct
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Streamlines projected on selected y-z planes and the mid x-y plane
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Normalized temperature (η) and velocity vectors projected at the middle x-z plane and at 0.01 Dh away from ribbed surfaces
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Normalized temperature (η) and velocity vectors projected at selected planes (P1,[[ellipsis]],P5). Scale for η is same as the one in Fig. 5.
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Mach number and velocity vectors projected on the middle x-y plane for case C3 in up-leg part of U-duct. 3, 4, and 5 denote the 3rd, 4th, and 5th ribs.
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Pressure contours and velocity vectors projected at 0.01 Dh away from the ribbed surface for case C3. Flow is from right to left over the first four ribs in the up-leg part.
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Normalized pressure in the middle x-z plane
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Nu/Nus for cases C1 and C2. Top: leading. Bottom: trailing.
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Spanwise-averaged Nu/Nus on leading, trailing, outer, and inner walls as a function of distance along U-duct from inlet to outlet for cases C1 and C2
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Peripherally-averaged Nu/Nus as a function of distance along U-duct from inlet to outlet. The measured data is from Wagner et al. 5.
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Nu/Nus for cases C3 and C4
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Spanwise-averaged Nu/Nus on leading, trailing, outer, and inner walls as a function of distance along U-duct from inlet to outlet for cases C3 and C4

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