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Technical Briefs

Forced Convection Along the Wavy Surface

[+] Author and Article Information
Chao-Kuang Chen1

Yue-Tzu Yang, Kuei-Hao Chang

 Department of Mechanical Engineering, National Cheng Kung University, Tainan 70101, Taiwan

1

Corresponding author.

J. Heat Transfer 133(10), 104503 (Aug 17, 2011) (5 pages) doi:10.1115/1.4004234 History: Received November 06, 2008; Accepted May 12, 2011; Published August 17, 2011; Online August 17, 2011

In this study, Prandtl’s transposition theorem is used to stretch the ordinary coordinate-system in certain direction. The small wavy surface can be transferred into a calculable plane coordinate-system. The new governing equations of turbulent forced convection along wavy surface are derived from complete Navier–Stokes equations. A simple transformation is proposed to transform the governing equations into boundary layer equations for solution by the cubic spline collocation method. The effects such as the wavy geometry, the local skin-friction and Nusselt number are studied. The results of the simulation show that it is more significant to increase heat transfer with small wavy surface than plat surface.

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Copyright © 2011 by American Society of Mechanical Engineers
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References

Figures

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Figure 4

Axial distribution of (2/Rex¯)1/2Nux¯

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Figure 3

The distribution of the (2Rex¯)1/2Cf

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Figure 2

Inviscid surface velocity distribution and axial distribution of pressure gradient

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Figure 1

Physical module and coordinate-system

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