Thermal patterns and hydrothermal waves (HTWs) in volatile drops

Khellil Sefiane, Yuki Fukatani, Yasuyuki Takata, Jungho Kim

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Experimental measurements of temperature and heat flux at the liquid-wall interface during the evaporation of sessile FC-72 droplets have been reported for the first time using infrared (IR) thermography. Simultaneous high-speed imaging of the evaporating drop was carried out to monitor the drop profile. The study demonstrates that recently evidenced hydrothermal waves are actually bulk waves that extend across the entire droplet volume. More importantly, thermal patterns occurring in the bulk of the drop affect the temperature and heat-flux distributions on the solid substrate and ultimately influence the droplet evaporation rate. These effects were found to be increasingly pronounced as the substrate temperature was raised. The implications for heat-transfer mechanisms and energy transport are discussed.

Original languageEnglish
Pages (from-to)9750-9760
Number of pages11
JournalLangmuir
Volume29
Issue number31
DOIs
Publication statusPublished - Aug 6 2013

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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