The influence of the surface microtexture on wettability properties and drop evaporation

S. Y. Misyura, G. V. Kuznetsov, D. V. Feoktistov, R. S. Volkov, V. S. Morozov, E. G. Orlova

Research output: Contribution to journalArticle

Abstract

The influence of different microstructure of the surface of aluminum alloy on the free convection in the liquid and the evaporation of the water drop were studied experimentally. Various textures were created using laser surface treatment. The character of water drop evaporation on heated structured surfaces was compared with that on untreated rough surface. Velocity fields were measured using the Micro Particle Image Velocimetry (Micro PIV) method. A chemical analysis of sample surfaces in the cavity and in its vicinity was carried out. The effect of different textures on the wettability properties is shown. The evaporation rate of a drop depends on several competing factors: the diameter of the wetted drop spot, the drop height, the convection due to the surface thermocapillary forces, and the convection caused by the surface microstructures. The article also assesses the individual impact of these factors. The greatest intensification of convection and evaporation is associated with textures in the form of craters with a diameter of about 50–100 μm. The competing influence of several parameters leads to the need of their optimization. This paper demonstrates a general approach to such an optimization.

Original languageEnglish
Pages (from-to)458-467
Number of pages10
JournalSurface and Coatings Technology
Volume375
DOIs
Publication statusPublished - 15 Oct 2019

Fingerprint

wettability
Wetting
Evaporation
evaporation
convection
textures
Textures
microstructure
Microstructure
optimization
evaporation rate
Water
particle image velocimetry
surface treatment
chemical analysis
Natural convection
craters
free convection
Velocity measurement
aluminum alloys

Keywords

  • Drop evaporation
  • Electron microscope
  • Microtexture surface
  • Surface laser exposure

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

The influence of the surface microtexture on wettability properties and drop evaporation. / Misyura, S. Y.; Kuznetsov, G. V.; Feoktistov, D. V.; Volkov, R. S.; Morozov, V. S.; Orlova, E. G.

In: Surface and Coatings Technology, Vol. 375, 15.10.2019, p. 458-467.

Research output: Contribution to journalArticle

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