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COMBINED RADIATION AND FREE CONVECTION HEAT TRANSFER IN A VERTICAL CHANNEL WITH ARBITRARY WALL EMISSIVITIES.

Author(s) : YAMADA Y.

Type of article: Article

Summary

ANALYTICAL AND EXPERIMENTAL STUDIES OF COMBINED RADIATION AND FREE CONVECTION HEAT TRANSFER IN A VERTICAL CHANNEL IN AN ABSORBING AND EMITTING MEDIUM ARE CONDUCTED. A CHANNEL CONSISTING OF PARALLEL PLATES IS HEATED ASYMMETRICALLY, RENDERING BOTH THE WALL AND GAS RADIATION IMPORTANT. A SET OF FUNDAMENTAL EQUATIONS IS ESTABLISHED USING THE EXPONENTIAL WIDE-BAND MODEL AND THE GRAY-GAS MODEL WITH ARBITRARY WALL EMISSIVITIES. NUMERICAL RESULTS ARE COMPARED WITH EXPERIMENTAL ONES. WALL EMISSIVITIES ARE FOUND TO HAVE A MAJOR EFFECT ON THE COMBINED HEAT TRANSFER IN THIS STUDY. THE GRAY-GAS MODEL IS SHOWN TO FAIL TO PREDICT THE NEGATIVE NET ABSORPTION IN A GAS LAYER NEXT TO AN INSULATED WALL.

Details

  • Original title: COMBINED RADIATION AND FREE CONVECTION HEAT TRANSFER IN A VERTICAL CHANNEL WITH ARBITRARY WALL EMISSIVITIES.
  • Record ID : 1989-0054
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 31 - n. 2
  • Publication date: 1988

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