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BOILING HEAT TRANSFER FROM SURFACES WITH POROUS LAYERS.

Author(s) : AFGAN N. H.

Type of article: Article

Summary

HEAT TRANSFER DURING THE BOILING OF WATER, ETHANOL AND R113 FROM A 30-70% POROUS LAYER AT ATMOSPHERIC PRESSURE WAS INVESTIGATED. BUBBLE BOILING ON A POROUS LAYER COMMENCED AT SMALL TEMPERATURE DIFFERENCES OF 1-1.5 K. AT HIGH HEAT FLUXES, A VAPOUR FILM APPEARS AT THE BASE OF THE POROUS LAYER, THUS A QUALITATIVE CHANGE IN THE MECHANISM OF BUBBLE BOILING OCCURS. IN RELATIVELY THICK POROUS LAYERS, THE TRANSITION TO THIS NEW MODE OF BOILING OCCURS AT CRITICAL HEAT FLUX VALUES 2 TO 3 TIMES GREATER THAN FOR SMOOTH SURFACES.

Details

  • Original title: BOILING HEAT TRANSFER FROM SURFACES WITH POROUS LAYERS.
  • Record ID : 1986-0078
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 28 - n. 2
  • Publication date: 1985

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