Open Access Research

Dual solutions of stagnation-point flow of a nanofluid over a stretching surface

Peri K Kameswaran1, Precious Sibanda1*, Chetteti RamReddy2 and Prabhala VSN Murthy3

Author Affiliations

1 School of Mathematical Sciences, University of KwaZulu-Natal, Private Bag X01, Scottsville, Pietermaritzburg, 3209, South Africa

2 Department of Mathematics, National Institute of Technology, Rourkela, Odisha, 769008, India

3 Department of Mathematics, Indian Institute of Technology, Kharagpur, 721302, India

For all author emails, please log on.

Boundary Value Problems 2013, 2013:188  doi:10.1186/1687-2770-2013-188

Published: 22 August 2013

Abstract

The paper discusses the effects of homogeneous-heterogeneous reactions on stagnation-point flow of a nanofluid over a stretching or shrinking sheet. The model presented describes mass transfer in copper-water and silver-water nanofluids. The governing system of equations is solved numerically, and the study shows that dual solutions exist for certain suction/injection, stretching/shrinking and magnetic parameter values. Comparison of the numerical results is made with previously published results for special cases.

Keywords:
homogeneous-heterogeneous reactions; nanofluids; volume fraction model; stretching or shrinking sheet; magnetic field strength