Effect of surface orientation on pool boiling heat transfer of nanoparticle suspensions

G. Prakash Narayan, Anoop Baby, G. Sateesh, Sarit K. Das

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

Several investigators have found that there is a significant effect of surface orientation on pool boiling performance and mechanisms, when a pure liquid is boiled over tubular heating surfaces. However, there is no similar study reported in literature for pool boiling of nanoparticle suspensions. This paper investigates the effect nanoparticles, suspended in pure liquids, can have on nucleate pool boiling heat transfer at various surface orientations. Systematic experiments were conducted on a smooth tube (average surface roughness 48 nm) of diameter 33 mm and length 170 mm at various inclinations (0°, 45° and 90°). Electro-statically stabilized water-based nanoparticle suspensions containing alumina nanoparticles (primary average sizes 47 nm and 150 nm) of concentrations 0.25%, 1% and 2% percent by weight were used. It has been found that there is a significant effect of surface orientation on the heat transfer performance. Horizontal orientation gave maximum heat transfer and the heating surface, when inclined at 45°, gave minimum heat transfer. Further, it was observed that surface-particle interaction and modified bubble motion can explain the behavior.

Original languageEnglish
Pages (from-to)145-160
Number of pages16
JournalInternational Journal of Multiphase Flow
Volume34
Issue number2
DOIs
Publication statusPublished - Feb 2008
Externally publishedYes

Fingerprint

boiling
Boiling liquids
Suspensions
heat transfer
Nanoparticles
Heat transfer
nanoparticles
horizontal orientation
Heating
heating
Particle interactions
Aluminum Oxide
Liquids
particle interactions
liquids
inclination
surface roughness
Alumina
bubbles
aluminum oxides

Keywords

  • Bubble sliding
  • Nanoparticles suspensions
  • Pool boiling
  • Surface orientation
  • Surface-particle interaction

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Mechanical Engineering

Cite this

Effect of surface orientation on pool boiling heat transfer of nanoparticle suspensions. / Prakash Narayan, G.; Baby, Anoop; Sateesh, G.; Das, Sarit K.

In: International Journal of Multiphase Flow, Vol. 34, No. 2, 02.2008, p. 145-160.

Research output: Contribution to journalArticle

Prakash Narayan, G. ; Baby, Anoop ; Sateesh, G. ; Das, Sarit K. / Effect of surface orientation on pool boiling heat transfer of nanoparticle suspensions. In: International Journal of Multiphase Flow. 2008 ; Vol. 34, No. 2. pp. 145-160.
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