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ISSN Druckformat: 2152-5102
ISSN Online: 2152-5110

# International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v35.i4.30
pages 326-339

## Mixed Convection Boundary-Layer Flow Along a Vertical Stretched Surface with Uniform Surface Mass Transfer

M. A. Hossain
COMSATS Institute of Information Technology, Department of Mathematics, Islamabad, Pakistan
Saleem Ashgar
Department of Mathematical Sciences, COMSATS Institute of Information Technology, Islamabad, Pakistan
Rama Subba Reddy Gorla
Department of Mechanical Engineering, Cleveland State University, Cleveland, OH, 44115 USA; Department of Mechanical Engineering, University of Akron, Akron, Ohio 44325, USA; Department of Mechanical & Civil Engineering, Purdue University Northwest, Westville, IN 46391, USA

### ABSTRAKT

In the present study, mixed convection heat transfer behavior of a viscous and incompressible fluid in the laminar boundary layer flow over a permeable vertical continuously stretching surface is investigated. The effects of buoyancy, permeability of the surface, and the stretching speed of the surface on the flow and heat transfer characteristics are considered. By introduction of one parametric group theory, the governing equations are reduced to coupled nonsimilarity equations. Exact solutions of these equations are obtained using the Keller box method. The results are then compared with those obtained by the perturbation method for small and large values of the local transpiration parameter, ξ. The numerical results, which are obtained for the flow and heat transfer characteristics, reveal the influences of the physical parameters such as the Prandtl number, Pr, the Richardson number, Ri, and the power law index, m, for the surface velocity as well as the surface temperature.

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