A molecular dynamics study of phobic/philic nano-patterning on pool boiling heat transfer

Ricardo Diaz, Zhixiong Guo

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Abstract

Molecular dynamics (MD) simulations were employed to investigate the pool boiling heat transfer of a liquid argon thin film on a flat, horizontal copper wall structured with vertical nanoscale pillars. The efficacy of phobic/philic nano-patterning for enhancing boiling heat transfer was scrutinized. Both nucleate and explosive boiling modes were considered. An error analysis demonstrated that the typical 2.5σ cutoff in MD simulations could under-predict heat flux by about 8.7 %, and 6σ cutoff was chosen here in order to maintain high accuracy. A new coordination number criterion was also introduced to better quantify evaporation characteristics. Results indicate that the argon-phobic/philic patterning tends to either have no effect, or decrease overall boiling heat flux, while the argon-philic nano-pillar/argon-philic wall shows the best heat transfer performance.

Original languageEnglish (US)
Pages (from-to)1061-1071
Number of pages11
JournalHeat and Mass Transfer/Waerme- und Stoffuebertragung
Volume53
Issue number3
DOIs
StatePublished - Mar 1 2017

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Fluid Flow and Transfer Processes

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