Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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An Investigation on Friction Factors and Heat Transfer Coefficients in a Rectangular Duct with Surface Roughness

  • Ahn, Soo-Whan (School of Transport Vehicle Engineering, Institute of Marine Industry, Gyeongsang National University) ;
  • Son, Kang-Pil (School of Transport Vehicle Engineering, Institute of Marine Industry, Gyeongsang National University)
  • Published : 2002.04.01
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Abstract

An investigation on the fully developed heat transfer and friction factor characteristics has been made in rectangular ducts with one-side roughened by five different shapes. The effects of rib shape geometries as well as Reynolds numbers are examined. The rib height-to-duct hydraulic diameter, pitch-to-height ratio, and aspect ratio of channel width to height are fixed at e/De=0.0476, P/e=8, and W/H=2.33, respectively. To understand the characteristics of heat transfer enhancements, the friction factors are also measured. The data indicates that the triangular type rib has a substantially higher heat transfer performance than any other ones.

Keywords

References

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