Numerical Study of Heat and Mass Transfer MHD Viscous Flow Over a Moving Wedge in the Presence of Viscous Dissipation and Heat Source/Sink with Convective Boundary Condition

Introduction: Convective heat and mass transfer in nanofluids is a topic of major contemporary interest in both science and technology. In view of this, an unsteady MHD free convective flow of nanofluids through a porous medium bound by a moving vertical semi-infinite permeable flat plate with a constant heat source and convective boundary condition in a rotating frame of reference is studied theoretically. Experimental: The novelty is the consideration of constant heat source and convective boundary condition in a rotating frame. The velocity along the plate i.e., slip velocity is assumed to oscillate in time with constant frequency so that the solutions of the boundary layer are of the same oscillatory type. The dimensionless governing equations for this investigation are solved analytically using small perturbation approximation. Two types of nanofluids, namely Cu-water and Al2O3-water are used. Results: The effects of various parameters on the flow, heat and mass transfer characteristics are discussed through graphs and tables. Conclusion: An increase in the convective parameter and nanoparticle volume fraction leads to increase the thermal boundary layer thickness but opposite effect occurs for heat generation.

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Influence of heat source/sink on a Maxwell fluid over a stretching surface with convective boundary condition in the presence of nanoparticles

Ain Shams Engineering Journal ◽

10.1016/j.asej.2014.04.003 ◽

2014 ◽

Vol 5 (3) ◽

pp. 991-998 ◽

Cited By ~ 58

Author(s):

G.K. Ramesh ◽

B.J. Gireesha

Keyword(s):

Boundary Condition ◽

Heat Source ◽

Maxwell Fluid ◽

Convective Boundary Condition ◽

Stretching Surface ◽

Convective Boundary ◽

Source Sink

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MHD Slip Flow of Newtonian Fluid past a Stretching Sheet with Thermal Convective Boundary Condition, Radiation, and Chemical Reaction

Mathematical Problems in Engineering ◽

10.1155/2013/359817 ◽

2013 ◽

Vol 2013 ◽

pp. 1-12 ◽

Cited By ~ 1

Author(s):

Reda G. Abdel-Rahman

Keyword(s):

Mass Transfer ◽

Boundary Condition ◽

Differential Equations ◽

Ordinary Differential Equations ◽

Heat And Mass Transfer ◽

Chemical Reaction ◽

Stretching Sheet ◽

Convective Boundary Condition ◽

Nonlinear Ordinary Differential Equations ◽

Convective Boundary

An analysis is carried out to study the problem of heat and mass transfer flow over a moving permeable flat stretching sheet in the presence of convective boundary condition, slip, radiation, heat generation/absorption, and first-order chemical reaction. The viscosity of fluid is assumed to vary linearly with temperature. Also the diffusivity is assumed to vary linearly with concentration. The governing partial differential equations have been reduced to the coupled nonlinear ordinary differential equations by using Lie group point of transformations. The system of transformed nonlinear ordinary differential equations is solved numerically using shooting techniques with fourth-order Runge-Kutta integration scheme. Comparison between the existing literature and the present study was carried out and found to be in excellent agreement. The effects of the various interesting parameters on the flow, heat, and mass transfer are analyzed and discussed through graphs in detail. The values of the local Nusselt number, the local skin friction, and the local Sherwood number for different physical parameters are also tabulated.

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