American Journal of Applied Mathematics 2016; 4(6): 296-309 http://www.sciencepublishinggroup.com/j/ajam doi: 10.11648/j.ajam.20160406.16 ISSN: 2330-0043 (Print); ISSN: 2330-006X (Online) Dufour and Soret Effects on MHD Forced Convective Heat and Mass Transfer Flow of Non-Newtonian Power Law Fluid with Thermal Radiation and Viscous Dissipation Chinmayee Podder 1, * , Md. Abdus Samad 2 1 Department of Mathematics, University of Barisal, Barisal, Bangladesh 2 Department of Applied Mathematics, University of Dhaka, Dhaka, Bangladesh Email address: [email protected] (C. Podder) * Corresponding author To cite this article: Chinmayee Podder, Md. Abdus Samad. Dufour and Soret Effects on MHD Forced Convective Heat and Mass Transfer Flow of Non- Newtonian Power Law Fluid with Thermal Radiation and Viscous Dissipation. American Journal of Applied Mathematics. Vol. 4, No. 6, 2016, pp. 296-309. doi: 10.11648/j.ajam.20160406.16 Received: September 26, 2016; Accepted: November 1, 2016; Published: November 29, 2016 Abstract: This paper investigates the Dufour and Soret effects of forced convection heat and mass transfer of an electrically conducting, non-Newtonian power-law fluid past a stretching sheet under the simultaneous action of suction, radiation, uniform transverse magnetic field, heat generation and viscous dissipation. The stretching sheet is assumed to continuously moving with a power-law velocity and maintaining a uniform surface heat flux. The governing nonlinear partial differential equations are transformed into a system of non linear ordinary differential equations using appropriate similarity transformations. The resulting dimensionless equations are solved numerically using sixth order Runge-Kutta integration scheme with Nachtsheim-Swigert shooting iterative technique. A systematical study of numerical results for the non- dimensional velocity, temperature and concentration profiles are presented graphically. The viscous drag or local Skin-friction coefficient, heat transfer rate or local Nusselt number and mass transfer rate or local Sherwood number are represented in tabular and graphical forms to illustrate the details of flow characteristics and their dependence on all physically important parameters in case of Newtonian and non-Newtonian (pseudo-plastic and dilatants) fluids. Keywords: Dufour Number, Soret Number, Non-Newtonian Power-Law Fluid, Thermal Radiation, Viscous Dissipation 1. Introduction The heat, mass and momentum transfer in the laminar boundary layer flow of non-Newtonian power law fluid on stretching sheets are important from a theoretical as well as practical point of view because of their wider applications to polymer technology, metallurgy, many mechanical forming processes, such as extrusion, melt-spinning, cooling, manufacture of plastic and rubber sheets, glass blowing, continuous casting and spinning of fibers etc. The interaction of radiation with hydromagnetic flow has become industrially more prominent in the processes wherever high temperatures occur. Nuclear power plants, gas turbines and the various propulsion devices for aircrafts, missiles, satellites and space vehicles are examples of such engineering areas. Forced convection should be considered as one of the main methods of useful heat transfer as significant amounts of heat energy can be transported very efficiently and this mechanism is found very commonly in everyday life, including central heating, air conditioning, steam turbines and designing or analyzing heat exchangers, pipe flow, and flow over a plate at a different temperature than the stream. Dufour effect is the inverse phenomenon of thermal diffusion. If two chemically different nonreacting gases or liquids, which were initially at the same temperature, are allowed to diffuse into each other, then there arises a difference of temperatures in the system. The difference in temperatures is retained if a concentration gradient is maintained. Soret effect (thermodiffusion) is the diffusion of material in an unevenly heated mixture of gases or a solution caused by the presence of a temperature gradient in the system. This normally applies to liquid mixtures, which behave
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American Journal of Applied Mathematics 2016; 4(6): 296-309
http://www.sciencepublishinggroup.com/j/ajam
doi: 10.11648/j.ajam.20160406.16
ISSN: 2330-0043 (Print); ISSN: 2330-006X (Online)
Dufour and Soret Effects on MHD Forced Convective Heat and Mass Transfer Flow of Non-Newtonian Power Law Fluid with Thermal Radiation and Viscous Dissipation
Chinmayee Podder1, *
, Md. Abdus Samad2
1Department of Mathematics, University of Barisal, Barisal, Bangladesh 2Department of Applied Mathematics, University of Dhaka, Dhaka, Bangladesh
there is an opposite behavior in the concentration field.
Dufour (��) and Soret (�) numbers show excellent mutual
interaction between temperature and concentration of the
flow field.
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Transfer Flow of Non-Newtonian Power Law Fluid with Thermal Radiation and Viscous Dissipation
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