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EFFECT OF PRESSURE GRADIENT IN FORCED CONVECTION FILM CONDENSATION ON A HORIZONTAL TUBE.

Author(s) : ROSE J. W.

Type of article: Article

Summary

IF THE PRESSURE GRADIENT, ARISING FROM THE FLOW OF VAPOUR OVER THE CURVED SURFACE, IS INCLUDED IN THE MOMENTUM BALANCE FOR THE CONDENSATE FILM, IT IS SHOWN TO LEAD TO A HIGHER HEAT TRANSFER COEFFICIENT OVER THE FORWARD HALF OF THE TUBE. UNDER CERTAIN CIRCUMSTANCES, THE CALCULATION OF THE CONDENSATE FILM THICKNESS AROUND THE TUBE IS NOT POSSIBLE FOR THE LOWER PART WHERE THE SURFACE SHEAR STRESS AND PRESSURE GRADIENT ACT IN OPPOSITE DIRECTIONS. NUMERICAL SOLUTIONS HAVE BEEN OBTAINED FOR WIDE RANGES OF THE RELEVANT DIMENSIONLESS PARAMETERS AND USED TO OBTAIN ACCURATE EXPRESSIONS FOR THE MEAN HEAT TRANSFER COEFFICIENT FOR THE WHOLE TUBE WHEN THE PRESSURE GRADIENT TERM IS UNIMPORTANT.

Details

  • Original title: EFFECT OF PRESSURE GRADIENT IN FORCED CONVECTION FILM CONDENSATION ON A HORIZONTAL TUBE.
  • Record ID : 1985-0093
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 27 - n. 1
  • Publication date: 1984/01

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