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Wall roughness effects on stagnation-point heat transfer beneath an impinging liquid jet.

Author(s) : GABOUR L. A., LIENHARD J. H.

Type of article: Article

Summary

Experiments were performed in which a fully developed turbulent water jet struck a uniformly heated rough surface. Heat transfer measurements were made for jets of diameters 4.4-9.0 mm over a Reynolds number range of 20,000 to 84,000. The Prandtl number was held nearly constant at 8.2-9.1. Results are presented for nine well-characterized rough surfaces. For a given roughness height and jet diameter, the minimum Reynolds number required to increase heat transfer above that of a smooth plate is established. A correlation for smooth wall heat transfer is also given.

Details

  • Original title: Wall roughness effects on stagnation-point heat transfer beneath an impinging liquid jet.
  • Record ID : 1995-0819
  • Languages: English
  • Source: J. Heat Transf. - vol. 116 - n. 1
  • Publication date: 1994/02
  • Document available for consultation in the library of the IIR headquarters only.

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