A theoretical study of enhanced condensation over horizontal fluted tubes

K. Fathalah, S. E. Aly, M. Darwish, A. Radhwan

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Abstract

A numerical study of steam condensation over horizontal fluted tubes is presented. Condensate is driven by surface tension to the groove valley where it is drained by gravity. From the bottom to the top the groove domain is divided into a valley section, crest section with large variations of condensate layer curvature, and tip section with gradual change of condensate layer curvature. In the valley section the effect of indentation angle α, the minimum condensate height αo and the circumferential angle θ on the drainage flow rate ·m are studied. In the crest section ( heat transfer domain ) the effect of α, αo and θ on the heat transfer coefficient h is investigated. Results showed that, a decrease in α increases both h, and ·m per groove. The groove flooding conditions could be obtained by comparing ·m in the valley and crest sections with more flooding for small values of α. The smaller the α angle, the larger the ·m provided that no excessive flooding occurs.

Original languageEnglish
Pages (from-to)25-42
Number of pages18
JournalDesalination
Volume65
Issue numberC
DOIs
Publication statusPublished - Nov 1987

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ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)
  • Water Science and Technology
  • Mechanical Engineering

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