Unsteady boundary-layer flow and heat transfer of a nanofluid over a permeable stretching/shrinking sheet

Norfifah Bachok, Anuar Mohd Ishak, Ioan Pop

Research output: Contribution to journalArticle

133 Citations (Scopus)

Abstract

The unsteady boundary layer flow of a nanofluid over a permeable stretching/shrinking sheet is theoretically studied. The governing partial differential equations are transformed into ordinary ones using a similarity transformation, before being solved numerically. The results are obtained for the skin friction coefficient, the local Nusselt number and the local Sherwood number as well as the velocity, temperature and the nanoparticle fraction profiles for some values of the governing parameters, namely, the unsteadiness parameter, the mass suction parameter, the Brownian motion parameter, the thermophoresis parameter, Prandtl number, Lewis number and the stretching/shrinking parameter. It is found that dual solutions exist for both stretching and shrinking cases. The results also indicate that both unsteadiness and mass suction widen the range of the stretching/shrinking parameter for which the solution exists.

Original languageEnglish
Pages (from-to)2102-2109
Number of pages8
JournalInternational Journal of Heat and Mass Transfer
Volume55
Issue number7-8
DOIs
Publication statusPublished - Mar 2012

Fingerprint

boundary layer flow
Boundary layer flow
Stretching
heat transfer
Heat transfer
Thermophoresis
suction
Skin friction
Brownian movement
Prandtl number
Nusselt number
Partial differential equations
thermophoresis
Lewis numbers
Nanoparticles
skin friction
partial differential equations
coefficient of friction
nanoparticles
Temperature

Keywords

  • Dual solutions
  • Nanofluid
  • Stretching/shrinking sheet
  • Unsteady boundary layer

ASJC Scopus subject areas

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

Cite this

Unsteady boundary-layer flow and heat transfer of a nanofluid over a permeable stretching/shrinking sheet. / Bachok, Norfifah; Mohd Ishak, Anuar; Pop, Ioan.

In: International Journal of Heat and Mass Transfer, Vol. 55, No. 7-8, 03.2012, p. 2102-2109.

Research output: Contribution to journalArticle

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