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Heat transfer model for evaporation in microchannels. 1. Presentation of the model.

Author(s) : THOME J. R., DUPONT V., JACOBI A. M.

Type of article: Article

Summary

A three-zone flow boiling model is proposed to describe evaporation of elongated bubbles in microchannels. The heat transfer model describes the transient variation in local heat transfer coefficient during the sequential and cyclic passage of (i) a liquid slug, (ii) an evaporating elongated bubble and (iii) a vapour slug. A time-averaged local heat transfer coefficient is thus obtained. The new model illustrates the importance of the strong cyclic variation in the heat transfer coefficient and the strong dependency of heat transfer on the bubble frequency, the minimum liquid film thickness at dryout and the liquid film formation thickness. (See also this Bulletin, reference 2005-0089.)

Details

  • Original title: Heat transfer model for evaporation in microchannels. 1. Presentation of the model.
  • Record ID : 2005-0095
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 47 - n. 14-16
  • Publication date: 2004/07

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