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Evaporation of water by free or mixed convection into humid air and superheated steam.

Author(s) : DEBBISSI C., ORFI J., BEN NASRALLAH S.

Type of article: Article

Summary

This article describes numerical analysis of the evaporation of water in pure air, humid air and superheated steam in an externally insulated channel. Results were obtained for mixed and free convection driven by combined thermal and mass buoyancy forces. For natural convection, analysis was restricted to the situation in which combined buoyancy forces act in the downward direction. The results show that below a certain temperature of the free stream, water evaporation rate decreases as the humidity of air increases and above it this relation reverses. This temperature 'inversion point temperature" was treated in previous experimental and numerical studies in the case of forced convection. In this work, particular attention was paid to the effect of the ambient conditions on the evaporation rate of water and the inversion temperature phenomenon under conditions of free and mixed convection.

Details

  • Original title: Evaporation of water by free or mixed convection into humid air and superheated steam.
  • Record ID : 2004-1655
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 46 - n. 24
  • Publication date: 2003/11

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