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, Changhoon Lee, I. Pop, Robert A. Van Gorder

Research output: Contribution to journalArticlepeer-review

215 Citations (Scopus)


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
Issue number5
Publication statusPublished - 2011 May

Bibliographical note

Funding Information:
The authors appreciate the comments of the reviewers, which have lead to definite improvement in the paper. K. V. Prasad expresses his grateful thanks to DST authorities for providing with the financial support through BOYSCAST fellowship. C. Lee acknowledges the support of the WCU program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology R31-2008-000-10049-0 .

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Engineering(all)


Dive into the research topics of 'Convective heat transfer in the flow of viscous Ag-water and Cu-water nanofluids over a stretching surface'. Together they form a unique fingerprint.

Cite this