Experimental investigation of the de-pinning phenomenon on rough surfaces of volatile drops

K Sefiane, L Tadrist

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper we present the preliminary results on the de-pinning phenomenon of wetting volatile drops. Wetting properties are analysed by measuring the drop base and the dynamic apparent contact angle. Three cases are investigated: reduced pressure environment, controlled substrate temperature and surfactants solutions. The experimental results are compared to the existing theories to interpret the de-pinning phenomenon. The Young unbalanced force acting through surface tension near the triple line seems to be the controlling mechanism behind the de-pinning phenomenon of evaporating drops. (c) 2005 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)482-490
Number of pages9
JournalInternational Communications in Heat and Mass Transfer
Volume33
Issue number4
DOIs
Publication statusPublished - Apr 2006

Keywords

  • evaporation, wetting
  • drops
  • contact line, de-pinning, equilibrium
  • CONTACT-ANGLE
  • EVAPORATION
  • HYSTERESIS
  • SESSILE
  • AIR

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