Stabilizer effect on CHF and boiling heat transfer coefficient of alumina/water nanofluids

Jung Yeul Jung, Eung Surk Kim, Yong Tae Kang

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

We measured the critical heat flux (CHF) and boiling heat transfer coefficient (BHTC) of water-based Al 2O 3 (alumina) nanofluids. To elucidate the stabilizer effect on CHF and BHTC of alumina/water nanofluids, a polyvinyl alcohol (PVA) was used as a stabilizer. The plate copper heater (10 × 10 mm 2) is used as the boiling surface and the concentration of alumina nanoparticle varies 0-0.1 vol.%. The results show that the BHTC of the nanofluids becomes lower than that of the base fluid as the concentration of nanoparticles increases while CHF of it becomes higher. It is found that the increase of CHF is directly proportional to the effective boiling surface area and the reduction of BHTC is mainly attributed to the blocking of the active nucleation cavity and the increase of the conduction resistance by the nanoparticle deposition on the boiling surface.

Original languageEnglish
Pages (from-to)1941-1946
Number of pages6
JournalInternational Journal of Heat and Mass Transfer
Volume55
Issue number7-8
DOIs
Publication statusPublished - 2012 Mar 1
Externally publishedYes

Fingerprint

Aluminum Oxide
heat transfer coefficients
boiling
Boiling liquids
Heat transfer coefficients
Heat flux
heat flux
Alumina
aluminum oxides
Water
water
Nanoparticles
nanoparticles
Polyvinyl Alcohol
polyvinyl alcohol
Polyvinyl alcohols
heaters
Copper
Nucleation
nucleation

Keywords

  • Binary nanofluid
  • Critical heat flux
  • Heat transfer coefficient
  • Pool boiling

ASJC Scopus subject areas

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

Cite this

Stabilizer effect on CHF and boiling heat transfer coefficient of alumina/water nanofluids. / Jung, Jung Yeul; Kim, Eung Surk; Kang, Yong Tae.

In: International Journal of Heat and Mass Transfer, Vol. 55, No. 7-8, 01.03.2012, p. 1941-1946.

Research output: Contribution to journalArticle

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AB - We measured the critical heat flux (CHF) and boiling heat transfer coefficient (BHTC) of water-based Al 2O 3 (alumina) nanofluids. To elucidate the stabilizer effect on CHF and BHTC of alumina/water nanofluids, a polyvinyl alcohol (PVA) was used as a stabilizer. The plate copper heater (10 × 10 mm 2) is used as the boiling surface and the concentration of alumina nanoparticle varies 0-0.1 vol.%. The results show that the BHTC of the nanofluids becomes lower than that of the base fluid as the concentration of nanoparticles increases while CHF of it becomes higher. It is found that the increase of CHF is directly proportional to the effective boiling surface area and the reduction of BHTC is mainly attributed to the blocking of the active nucleation cavity and the increase of the conduction resistance by the nanoparticle deposition on the boiling surface.

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