Convective heat transfer in the flow of viscous Ag-water and Cu-water nanofluids over a stretching surface

K. Vajravelu, K. V. Prasad, Jinho Lee, Chang Hoon Lee, I. Pop, Robert A. Van Gorder

Research output: Contribution to journalArticle

167 Citations (Scopus)

Abstract

An analysis is carried out to study the convective heat transfer in a nanofluid flow over a stretching surface. In particular, we focus on Ag-water and Cu-water nanofluids, and investigate the effects of the nanoparticle volume fraction on the flow and heat transfer characteristics under the influence of thermal buoyancy and temperature dependent internal heat generation or absorption. The numerical results indicate that an increase in the nanoparticle volume fraction will decrease the velocity boundary layer thickness while increasing the thermal boundary layer thickness, even in the presence of free convection currents and internal heat generation. Meanwhile, the presence of nanoparticles results in an increase in the magnitude of the skin friction along the surface and a decrease in the magnitude of the local Nusselt number. Such effects are found to be more pronounced in the Ag-water solution than in the Cu-water solution; indeed, the Ag-water solution decreases the boundary layer thickness more than that of the Cu-water solution.

Original languageEnglish
Pages (from-to)843-851
Number of pages9
JournalInternational Journal of Thermal Sciences
Volume50
Issue number5
DOIs
Publication statusPublished - 2011 May 1

Fingerprint

convective heat transfer
Stretching
Heat transfer
boundary layer thickness
water
Water
Boundary layers
heat generation
Heat generation
Nanoparticles
nanoparticles
Volume fraction
convection currents
thermal boundary layer
skin friction
Skin friction
Nusselt number
Buoyancy
Natural convection
buoyancy

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Engineering(all)

Cite this

@article{d50b51796298428fb3d3a920301436b5,
title = "Convective heat transfer in the flow of viscous Ag-water and Cu-water nanofluids over a stretching surface",
abstract = "An analysis is carried out to study the convective heat transfer in a nanofluid flow over a stretching surface. In particular, we focus on Ag-water and Cu-water nanofluids, and investigate the effects of the nanoparticle volume fraction on the flow and heat transfer characteristics under the influence of thermal buoyancy and temperature dependent internal heat generation or absorption. The numerical results indicate that an increase in the nanoparticle volume fraction will decrease the velocity boundary layer thickness while increasing the thermal boundary layer thickness, even in the presence of free convection currents and internal heat generation. Meanwhile, the presence of nanoparticles results in an increase in the magnitude of the skin friction along the surface and a decrease in the magnitude of the local Nusselt number. Such effects are found to be more pronounced in the Ag-water solution than in the Cu-water solution; indeed, the Ag-water solution decreases the boundary layer thickness more than that of the Cu-water solution.",
author = "K. Vajravelu and Prasad, {K. V.} and Jinho Lee and Lee, {Chang Hoon} and I. Pop and {Van Gorder}, {Robert A.}",
year = "2011",
month = "5",
day = "1",
doi = "10.1016/j.ijthermalsci.2011.01.008",
language = "English",
volume = "50",
pages = "843--851",
journal = "International Journal of Thermal Sciences",
issn = "1290-0729",
publisher = "Elsevier Masson SAS",
number = "5",

}

Convective heat transfer in the flow of viscous Ag-water and Cu-water nanofluids over a stretching surface. / Vajravelu, K.; Prasad, K. V.; Lee, Jinho; Lee, Chang Hoon; Pop, I.; Van Gorder, Robert A.

In: International Journal of Thermal Sciences, Vol. 50, No. 5, 01.05.2011, p. 843-851.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Convective heat transfer in the flow of viscous Ag-water and Cu-water nanofluids over a stretching surface

AU - Vajravelu, K.

AU - Prasad, K. V.

AU - Lee, Jinho

AU - Lee, Chang Hoon

AU - Pop, I.

AU - Van Gorder, Robert A.

PY - 2011/5/1

Y1 - 2011/5/1

N2 - An analysis is carried out to study the convective heat transfer in a nanofluid flow over a stretching surface. In particular, we focus on Ag-water and Cu-water nanofluids, and investigate the effects of the nanoparticle volume fraction on the flow and heat transfer characteristics under the influence of thermal buoyancy and temperature dependent internal heat generation or absorption. The numerical results indicate that an increase in the nanoparticle volume fraction will decrease the velocity boundary layer thickness while increasing the thermal boundary layer thickness, even in the presence of free convection currents and internal heat generation. Meanwhile, the presence of nanoparticles results in an increase in the magnitude of the skin friction along the surface and a decrease in the magnitude of the local Nusselt number. Such effects are found to be more pronounced in the Ag-water solution than in the Cu-water solution; indeed, the Ag-water solution decreases the boundary layer thickness more than that of the Cu-water solution.

AB - An analysis is carried out to study the convective heat transfer in a nanofluid flow over a stretching surface. In particular, we focus on Ag-water and Cu-water nanofluids, and investigate the effects of the nanoparticle volume fraction on the flow and heat transfer characteristics under the influence of thermal buoyancy and temperature dependent internal heat generation or absorption. The numerical results indicate that an increase in the nanoparticle volume fraction will decrease the velocity boundary layer thickness while increasing the thermal boundary layer thickness, even in the presence of free convection currents and internal heat generation. Meanwhile, the presence of nanoparticles results in an increase in the magnitude of the skin friction along the surface and a decrease in the magnitude of the local Nusselt number. Such effects are found to be more pronounced in the Ag-water solution than in the Cu-water solution; indeed, the Ag-water solution decreases the boundary layer thickness more than that of the Cu-water solution.

UR - http://www.scopus.com/inward/record.url?scp=79951970638&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79951970638&partnerID=8YFLogxK

U2 - 10.1016/j.ijthermalsci.2011.01.008

DO - 10.1016/j.ijthermalsci.2011.01.008

M3 - Article

VL - 50

SP - 843

EP - 851

JO - International Journal of Thermal Sciences

JF - International Journal of Thermal Sciences

SN - 1290-0729

IS - 5

ER -