Influence of nanoparticles on boiling heat transfer

Dongsheng Wen

Research output: Contribution to journalArticlepeer-review

56 Scopus citations

Abstract

Two sets of experiments are performed in this work to reveal the potential effect of nanoparticles on boiling heat transfer: i) pool boiling of nanofluids on two well-defined boiling surfaces and ii) bubble formation in a quiescent pool of nanofluids under adiabatic conditions. Different to the conventional thoughts that the modification of boiling heat transfer is the result of solid surface modification by particle sedimentations forming a porous or coating layer, the result suggests that both the particle deposition effect, and the collective effect of particles suspending in liquid could affect the boiling heat transfer significantly. The particle deposition effect is influenced by the relative size between particles suspended in the liquid medium and the surface geometry, and their interactions. Nanoparticles suspended in the liquid alone can affect bubble formation significantly by modifying bubble dynamics such as bubble departure volume and departure frequency. Both roles are likely co-existent in a typical nanofluids boiling system. Depending on different applications, properly surface engineering could minimize the particle deposition effect yet still contribute to the modification of heat transfer through the second mechanism.

Original languageEnglish
Pages (from-to)2-9
Number of pages8
JournalApplied Thermal Engineering
Volume41
DOIs
StatePublished - Aug 2012
Externally publishedYes

Keywords

  • Boiling
  • Bubble
  • Meniscus
  • Nanofluids
  • Nanoparticles
  • Wetting

Fingerprint

Dive into the research topics of 'Influence of nanoparticles on boiling heat transfer'. Together they form a unique fingerprint.

Cite this