Critical heat flux of pool boiling on Si nanowire array-coated surfaces

Ming-Chang Lu*, Renkun Chen, Vinod Srinivasan, Van P. Carey, Arun Majumdar

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

146 Scopus citations

Abstract

Pool boiling of saturated water on plain Si surfaces and surfaces covered with a dense array of Si nanowires (SiNWs) has been studied. Measured CHF and heat transfer coefficient (HTC) values of about 223 ± 5.61 W/cm 2 and 9 ± 1.60 W/cm 2 K, respectively, on the nanowire array-coated surface are among the highest reported in boiling heat transfer. Meanwhile, the CHFs on both nanowire-coated and Plain Si surfaces show a similar heater size dependence - the CHF increases as heater size decreases. The measured CHFs on both types of surfaces are approximately following the prediction of the hydrodynamic theory assuming the Helmholtz wavelength equal to the corresponded heater length. It suggests that the CHFs on both types of surfaces might be limited by pool hydrodynamics.

Original languageEnglish
Pages (from-to)5359-5367
Number of pages9
JournalInternational Journal of Heat and Mass Transfer
Volume54
Issue number25-26
DOIs
StatePublished - 1 Dec 2011

Keywords

  • Critical heat flux
  • Hydrodynamics
  • Nanowires
  • Pool boiling

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