Free- and mixed-convection flow past a horizontal surface in a nanofluid

Norihan M. Arifin, Roslinda Mohd. Nazar, Ioan Pop

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

An analysis of the steady free- and mixed-convection boundary-layer flow past a horizontal impermeable surface embedded in a porous medium filled with a nanofluid is performed in this paper. Similarity solutions are obtained for the convective flow above a heated surface or below a cooled surface, where wall temperature is a power function of the distance from the origin. The similarity equations are solved numerically for three types of metallic or nonmetallic nanoparticles such as copper (Cu), alumina (Al 2O 3), and titania (TiO 2) in a water-based fluid to investigate the effect of the solid volume fraction or nanoparticle volume fraction parameter V of the nanofluid on the flow and heat transfer characteristics. The case of conventional or regular fluid (V = 0) is also considered for comparison with known results from the open literature. The comparison shows excellent agreement. The surface velocity, the local Nusselt number, and the velocity and temperature profiles are presented and discussed. It is found that the solid volume fraction affects the fluid flow and heat transfer characteristics in some way.

Original languageEnglish
Pages (from-to)375-382
Number of pages8
JournalJournal of Thermophysics and Heat Transfer
Volume26
Issue number2
DOIs
Publication statusPublished - Apr 2012

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convection
heat transfer
nanoparticles
boundary layer flow
convective flow
fluids
wall temperature
Nusselt number
temperature profiles
surface temperature
fluid flow
aluminum oxides
titanium
velocity distribution
copper
water

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Free- and mixed-convection flow past a horizontal surface in a nanofluid. / Arifin, Norihan M.; Mohd. Nazar, Roslinda; Pop, Ioan.

In: Journal of Thermophysics and Heat Transfer, Vol. 26, No. 2, 04.2012, p. 375-382.

Research output: Contribution to journalArticle

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