Extraordinary shifts of the leidenfrost temperature from multiscale micro/nanostructured surfaces

Corey Kruse, Troy Anderson, Chris Wilson, Craig Zuhlke, Dennis Alexander, George Gogos, Sidy Ndao

Research output: Contribution to journalArticle

98 Citations (Scopus)

Abstract

In the present work, the effects of surface chemistry and micro/nanostructuring on the Leidenfrost temperature are experimentally investigated. The functional surfaces were fabricated on a 304 stainless steel surface via femtosecond laser surface processing (FLSP). The droplet lifetime experimental method was employed to determine the Leidenfrost temperature for both machine-polished and textured surfaces. A precision dropper was used to control the droplet size to 4.2 μL and surface temperatures were measured by means of an embedded thermocouple. Extraordinary shifts in the Leidenfrost temperatures, as high as 175 C relative to the polished surface, were observed with the laser-processed surfaces. These extraordinary shifts were attributed to nanoporosity, reduction in contact angle, intermittent liquid/solid contacts, and capillary wicking actions resulting from the presence of self-assembled nanoparticles formed on the surfaces. In addition to the shift in the Leidenfrost temperature, significant enhancement of the heat transfer in the film boiling regime was also observed for the laser-processed surfaces; water droplet evaporation times were reduced by up to 33% for a surface temperature of 500 C.

Original languageEnglish (US)
Pages (from-to)9798-9806
Number of pages9
JournalLangmuir
Volume29
Issue number31
DOIs
StatePublished - Aug 6 2013

Fingerprint

shift
Temperature
temperature
surface temperature
film boiling
lasers
Lasers
thermocouples
Stainless Steel
Thermocouples
Surface chemistry
Ultrashort pulses
stainless steels
Contacts (fluid mechanics)
Boiling liquids
Contact angle
heat transfer
Evaporation
evaporation
Stainless steel

ASJC Scopus subject areas

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

Cite this

Extraordinary shifts of the leidenfrost temperature from multiscale micro/nanostructured surfaces. / Kruse, Corey; Anderson, Troy; Wilson, Chris; Zuhlke, Craig; Alexander, Dennis; Gogos, George; Ndao, Sidy.

In: Langmuir, Vol. 29, No. 31, 06.08.2013, p. 9798-9806.

Research output: Contribution to journalArticle

Kruse, Corey ; Anderson, Troy ; Wilson, Chris ; Zuhlke, Craig ; Alexander, Dennis ; Gogos, George ; Ndao, Sidy. / Extraordinary shifts of the leidenfrost temperature from multiscale micro/nanostructured surfaces. In: Langmuir. 2013 ; Vol. 29, No. 31. pp. 9798-9806.
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