Supersonically sprayed reduced graphene oxide film to enhance critical heat flux in pool boiling

Seongpil An, Do Yeon Kim, Jong Gun Lee, Hong Seok Jo, Min Woo Kim, Salem S. Al-Deyab, Jeehoon Choi, Suk Goo Yoon

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Reduced graphene oxide (rGO) flakes were supersonically sprayed onto a copper substrate, which was used to enhance the heat transfer between the cooling liquid and heat source in pool boiling. The results show that both the critical heat flux at which film bubbles are formed and the effective heat transfer coefficient increased substantially. The surface temperature of the heat source decreased substantially during efficient heat transfer. The higher wettability of the rGO film increased the cohesion of the cooling liquid with the heated surface. The roughened surface of the rGO film also facilitated the formation of small-scale bubbles that enhanced mixing and thus increased the rate of heat transfer. The rGO film was characterized using scanning electron microscopy, atomic force microscopy, and optical profiling.

Original languageEnglish
Pages (from-to)124-130
Number of pages7
JournalInternational Journal of Heat and Mass Transfer
Volume98
DOIs
Publication statusPublished - 2016 Jul 1

Keywords

  • Critical heat flux
  • Graphene oxide
  • Pool boiling
  • Supersonic cold spraying

ASJC Scopus subject areas

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

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