Effect of static contact angle on the droplet dynamics during the evaporation of a water droplet on the hot walls

Deendarlianto, Yasuyuki Takata, Sumitomo Hidaka, Indarto, Adhika Widyaparaga, Samsul Kamal, Purnomo, Masamichi Kohno

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The effect of surface wettability on the collision dynamics and heat transfer phenomena of a single water droplet impacting upon a heated solid surface has been studied experimentally. To modify the surface wettability, two modules of stainless steel coated by TiO2 were employed. The first module was induced by ultraviolet irradiation to produce the hydrophilic surface, while the second one was not. The diameter and the depth of coating surface were 30 mm and 200 nm, respectively. The droplet size was varied from 1.90 to 2.90 mm and substrate temperature raised up to 340 C. The interaction of an impact water droplet with a heated solid surface was investigated using a high-speed video camera. As a result, it was found that; (1) in the lower surface temperature region the evaporation time decreases as the static contact angle decreases, (2) the wetting limit temperature decreases with the increase of static contact angle, (3) the ultraviolet irradiation on the TiO2 surface does not change the qualitative behavior of the evolution of wetting diameters, and (4) the maximum wetting diameter increases with the decrease of static contact angle below the wetting limit temperatures.

Original languageEnglish
Pages (from-to)691-705
Number of pages15
JournalInternational Journal of Heat and Mass Transfer
Volume71
DOIs
Publication statusPublished - Apr 1 2014

Fingerprint

Contact angle
Evaporation
wetting
evaporation
Wetting
Water
water
wettability
solid surfaces
modules
irradiation
surface temperature
Irradiation
temperature
stainless steels
Temperature
heat transfer
cameras
high speed
High speed cameras

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Cite this

Effect of static contact angle on the droplet dynamics during the evaporation of a water droplet on the hot walls. / Deendarlianto, ; Takata, Yasuyuki; Hidaka, Sumitomo; Indarto; Widyaparaga, Adhika; Kamal, Samsul; Purnomo, ; Kohno, Masamichi.

In: International Journal of Heat and Mass Transfer, Vol. 71, 01.04.2014, p. 691-705.

Research output: Contribution to journalArticle

Deendarlianto, ; Takata, Yasuyuki ; Hidaka, Sumitomo ; Indarto ; Widyaparaga, Adhika ; Kamal, Samsul ; Purnomo, ; Kohno, Masamichi. / Effect of static contact angle on the droplet dynamics during the evaporation of a water droplet on the hot walls. In: International Journal of Heat and Mass Transfer. 2014 ; Vol. 71. pp. 691-705.
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AU - Kamal, Samsul

AU - Purnomo,

AU - Kohno, Masamichi

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