2-D and 3-D modulated porous coatings for enhanced pool boiling

D. H. Min, G. S. Hwang, Y. Usta, O. N. Cora, Muammer Koç, M. Kaviany

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

A new fabrication method (hot-powder compaction) is developed to readily make 2-D and 3-D modulated coatings for enhanced pool-boiling performance. The modulated coatings are 2-D and 3-D stacks with different height, width, and pitch (modulation wavelength), and made with different particle diameters and porosities. The maximum measured critical heat flux (qCHF) of 2-D and 3-D modulated coatings are 3.3 and 2.0 times that of the surface without coatings (plain). As expected from the hydrodynamic stability theory, the experimental results for 2-D coatings are similar to 3-D coatings and show that qCHF strongly depends on the modulation wavelength, while particle diameter and porosity have a little effects. The results also suggest that a stack aspect ratio (height to pitch) larger than unity is needed for modulation enhancement of the critical heat flux.

Original languageEnglish
Pages (from-to)2607-2613
Number of pages7
JournalInternational Journal of Heat and Mass Transfer
Volume52
Issue number11-12
DOIs
Publication statusPublished - May 2009
Externally publishedYes

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Keywords

  • 2-D and 3-D modulations
  • Critical heat flux
  • Enhanced pool boiling
  • Modulated porous coating
  • Wick superheat

ASJC Scopus subject areas

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

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