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

61 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

Fingerprint

boiling
Boiling liquids
coatings
Coatings
Modulation
modulation
Heat flux
heat flux
Porosity
porosity
flow stability
Wavelength
plains
wavelengths
Powders
aspect ratio
Aspect ratio
unity
Compaction
Hydrodynamics

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

Cite this

2-D and 3-D modulated porous coatings for enhanced pool boiling. / Min, D. H.; Hwang, G. S.; Usta, Y.; Cora, O. N.; Koç, Muammer; Kaviany, M.

In: International Journal of Heat and Mass Transfer, Vol. 52, No. 11-12, 05.2009, p. 2607-2613.

Research output: Contribution to journalArticle

Min, D. H. ; Hwang, G. S. ; Usta, Y. ; Cora, O. N. ; Koç, Muammer ; Kaviany, M. / 2-D and 3-D modulated porous coatings for enhanced pool boiling. In: International Journal of Heat and Mass Transfer. 2009 ; Vol. 52, No. 11-12. pp. 2607-2613.
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