The boundary layers of an unsteady stagnation-point flow in a nanofluid

Norfifah Bachok, Anuar Mohd Ishak, Ioan Pop

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

The boundary layer of an unsteady two-dimensional stagnation-point flow of a nanofluid is further investigated. The similarity equations are solved numerically for three types of nanoparticles, namely copper (Cu), alumina (Al 2O 3), and titania (TiO 2) in the water based fluid with Prandtl number Pr = 6.2. The skin friction coefficient, the local Nusselt number, and the velocity and temperature profiles are presented and discussed. Effects of the solid volume fraction parameter φ on the fluid flow and heat transfer characteristics are thoroughly examined. Interesting observation is that there are dual solutions seen for negative values of the unsteadiness parameter A (decelerating flow with A < 0).

Original languageEnglish
Pages (from-to)6499-6505
Number of pages7
JournalInternational Journal of Heat and Mass Transfer
Volume55
Issue number23-24
DOIs
Publication statusPublished - Nov 2012

Fingerprint

stagnation point
Aluminum Oxide
Skin friction
Prandtl number
Nusselt number
Flow of fluids
Copper
boundary layers
Volume fraction
Boundary layers
Alumina
Titanium
Nanoparticles
Heat transfer
Fluids
skin friction
Water
temperature profiles
coefficient of friction
fluid flow

Keywords

  • Dual solutions
  • Nanofluids
  • Stagnation-point flow
  • Unsteady boundary layer

ASJC Scopus subject areas

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

Cite this

The boundary layers of an unsteady stagnation-point flow in a nanofluid. / Bachok, Norfifah; Mohd Ishak, Anuar; Pop, Ioan.

In: International Journal of Heat and Mass Transfer, Vol. 55, No. 23-24, 11.2012, p. 6499-6505.

Research output: Contribution to journalArticle

@article{21e7d1d2dca242c59583788ac40e0a1f,
title = "The boundary layers of an unsteady stagnation-point flow in a nanofluid",
abstract = "The boundary layer of an unsteady two-dimensional stagnation-point flow of a nanofluid is further investigated. The similarity equations are solved numerically for three types of nanoparticles, namely copper (Cu), alumina (Al 2O 3), and titania (TiO 2) in the water based fluid with Prandtl number Pr = 6.2. The skin friction coefficient, the local Nusselt number, and the velocity and temperature profiles are presented and discussed. Effects of the solid volume fraction parameter φ on the fluid flow and heat transfer characteristics are thoroughly examined. Interesting observation is that there are dual solutions seen for negative values of the unsteadiness parameter A (decelerating flow with A < 0).",
keywords = "Dual solutions, Nanofluids, Stagnation-point flow, Unsteady boundary layer",
author = "Norfifah Bachok and {Mohd Ishak}, Anuar and Ioan Pop",
year = "2012",
month = "11",
doi = "10.1016/j.ijheatmasstransfer.2012.06.050",
language = "English",
volume = "55",
pages = "6499--6505",
journal = "International Journal of Heat and Mass Transfer",
issn = "0017-9310",
publisher = "Elsevier Limited",
number = "23-24",

}

TY - JOUR

T1 - The boundary layers of an unsteady stagnation-point flow in a nanofluid

AU - Bachok, Norfifah

AU - Mohd Ishak, Anuar

AU - Pop, Ioan

PY - 2012/11

Y1 - 2012/11

N2 - The boundary layer of an unsteady two-dimensional stagnation-point flow of a nanofluid is further investigated. The similarity equations are solved numerically for three types of nanoparticles, namely copper (Cu), alumina (Al 2O 3), and titania (TiO 2) in the water based fluid with Prandtl number Pr = 6.2. The skin friction coefficient, the local Nusselt number, and the velocity and temperature profiles are presented and discussed. Effects of the solid volume fraction parameter φ on the fluid flow and heat transfer characteristics are thoroughly examined. Interesting observation is that there are dual solutions seen for negative values of the unsteadiness parameter A (decelerating flow with A < 0).

AB - The boundary layer of an unsteady two-dimensional stagnation-point flow of a nanofluid is further investigated. The similarity equations are solved numerically for three types of nanoparticles, namely copper (Cu), alumina (Al 2O 3), and titania (TiO 2) in the water based fluid with Prandtl number Pr = 6.2. The skin friction coefficient, the local Nusselt number, and the velocity and temperature profiles are presented and discussed. Effects of the solid volume fraction parameter φ on the fluid flow and heat transfer characteristics are thoroughly examined. Interesting observation is that there are dual solutions seen for negative values of the unsteadiness parameter A (decelerating flow with A < 0).

KW - Dual solutions

KW - Nanofluids

KW - Stagnation-point flow

KW - Unsteady boundary layer

UR - http://www.scopus.com/inward/record.url?scp=84865783106&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84865783106&partnerID=8YFLogxK

U2 - 10.1016/j.ijheatmasstransfer.2012.06.050

DO - 10.1016/j.ijheatmasstransfer.2012.06.050

M3 - Article

AN - SCOPUS:84865783106

VL - 55

SP - 6499

EP - 6505

JO - International Journal of Heat and Mass Transfer

JF - International Journal of Heat and Mass Transfer

SN - 0017-9310

IS - 23-24

ER -