Rupture of a subcooled liquid film falling down a heated grooved surface

D. V. Zaitsev, M. Lozano Aviles, H. Auracher, O. A. Kabov

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

This paper presents an experimental study of rupture of a subcooled water film falling down an 1 m long heated copper plate with longitudinal grooves of 0.5×0.15 mm2 cross sectional area and 2 mm spacing. It was found that the threshold heat flux at which an initial stable dry patch forms on the grooved surface is about two times higher than that on a smooth surface. Furthermore, the grooves prevent dry patches from spreading over the total heated surface thus essentially delaying the onset of the heat transfer crisis. The main governing parameters of the experiment and their respective values are: initial film temperature (20-95°C), heat flux (0-1.26 W/cm2) and volumetric flow rate (11.1-38.2 l/h) (Re=56.2-653.2).

Original languageEnglish
Pages (from-to)71-74
Number of pages4
JournalMicrogravity Science and Technology
Volume19
Issue number3-4
DOIs
Publication statusPublished - 1 Jan 2007

ASJC Scopus subject areas

  • Modelling and Simulation
  • Engineering(all)
  • Physics and Astronomy(all)
  • Applied Mathematics

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