Effects of hydrophobic-spot periphery and subcooling on nucleate pool boiling from a mixed-wettability surface

Bambang Joko Suroto, Masahiro Tashiro, Sana Hirabayashi, Sumitomo Hidaka, Masamichi Kohno, Yasuyuki Takata

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

The effect of subcooling and length of hydrophobic-spot periphery on nucleate pool boiling heat transfer from TiO2-coated surface with and without PTFE (polyetatafluoroethylene) hydrophobic circle spots at intermediate heat flux has been examined. The experiments are performed with liquid subcooling ranging from 0-20 K and heat transfer block used were TiO2-coated copper block with a PTFE hydrophobic circle spot with various diameters with total area of PTFE being constant. Bubble nucleation and behavior were observed by using high-speed camera. The results showed that the heat transfer performance of surfaces with PTFE hydrophobic circle spot is better than superhydrophilic surface in overall condition. Furthermore, the heat transfer performance decreases under subcooled condition for all surfaces. Increase in peripheral length of hydrophobic-spot enhances the heat transfer performance.

Original languageEnglish
Pages (from-to)294-308
Number of pages15
JournalJournal of Thermal Science and Technology
Volume8
Issue number1
DOIs
Publication statusPublished - Aug 21 2013

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wettability
boiling
Boiling liquids
Wetting
heat transfer
Heat transfer
high speed cameras
High speed cameras
Heat flux
Copper
heat flux
Nucleation
bubbles
nucleation
copper
Liquids
liquids
Experiments

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Instrumentation
  • Engineering (miscellaneous)

Cite this

Effects of hydrophobic-spot periphery and subcooling on nucleate pool boiling from a mixed-wettability surface. / Suroto, Bambang Joko; Tashiro, Masahiro; Hirabayashi, Sana; Hidaka, Sumitomo; Kohno, Masamichi; Takata, Yasuyuki.

In: Journal of Thermal Science and Technology, Vol. 8, No. 1, 21.08.2013, p. 294-308.

Research output: Contribution to journalArticle

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