Soret and Dufour effects on MHD convective heat and mass transfer of a power-law fluid over an inclined plate with variable thermal conductivity in a porous medium

2013 ◽  
Vol 219 (14) ◽  
pp. 7556-7574 ◽  
Author(s):  
Dulal Pal ◽  
Sewli Chatterjee
Keyword(s):  
Thermal Conductivity ◽  
Mass Transfer ◽  
Porous Medium ◽  
Heat And Mass Transfer ◽  
Convective Heat ◽  
Power Law ◽  
Variable Thermal Conductivity ◽  
Power Law Fluid ◽  
Inclined Plate ◽  
Soret And Dufour Effects

Free Convective Heat and Mass Transfer in a Doubly Stratified Porous Medium Saturated with a Power-Law Fluid

2009 ◽  
Vol 36 (6) ◽  
pp. 524-537 ◽  
Author(s):  
P. A. Lakshmi Narayana ◽  
P. V. S. N. Murthy ◽  
P. V. S. S. S. R. Krishna ◽  
Adrian Postelnicu
Keyword(s):  
Mass Transfer ◽  
Porous Medium ◽  
Heat And Mass Transfer ◽  
Convective Heat ◽  
Power Law ◽  
Power Law Fluid

scholarly journals Soret and Dufour effects on mixed convection from a vertical plate in power-law fluid saturated porous medium

2013 ◽  
Vol 40 (4) ◽  
pp. 525-542 ◽  
Author(s):  
D. Srinivasacharya ◽  
Swamy Reddy
Keyword(s):  
Mass Transfer ◽  
Porous Medium ◽  
Differential Equations ◽  
Mixed Convection ◽  
Heat And Mass Transfer ◽  
Power Law ◽  
Vertical Plate ◽  
Saturated Porous Medium ◽  
Power Law Fluid ◽  
Soret And Dufour Effects

Mixed convection heat and mass transfer along a vertical plate embedded in a power-law fluid saturated Darcy porous medium with Soret and Dufour effects is studied. The governing partial differential equations are transformed into ordinary differential equations using similarity transformations and then solved numerically using shooting method. The effect of Soret and Dufour parameters, power law index and mixed convection parameter on non-dimensional velocity, temperature and concentration fields are discussed. The variation of different parameters on heat and mass transfer rates is presented in tabular form.

scholarly journals Effect of variable thermal conductivity on convective heat and mass transfer over a vertical plate in a rotating system with variable porosity regime

2014 ◽  
Vol 11 (1) ◽  
pp. 83-92 ◽  
Author(s):  
Mallikarjuna Bandaru ◽  
R. Bhuvana Vijaya
Keyword(s):  
Thermal Conductivity ◽  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Convective Heat ◽  
Vertical Plate ◽  
Variable Thermal Conductivity ◽  
Reaction Parameter ◽  
Rotating System ◽  
Variable Porosity ◽  
Chemical Reaction Parameter

Mathematical model has been presented to investigate the effect of variable thermal conductivity on Darcy mixed convective heat and mass transfer flow past a vertical plate in a rotating system by taking into account of variable porosity regime and chemical reaction parameter. The governing boundary layer equations for the flow, energy and species are transformed into system of ordinary differential equations using similarity transformations and then solved numerically by employing Fourth order Runge-Kutta method with shooting technique for various values of physical parameters. The effects of variable thermal conductivity, chemical reaction parameter and variable porosity regime on the fluid velocity, temperature and concentration, local skin friction and rate of heat and mass transfer distribution in the regime are presented graphically and analyzed in detail. We compare the results with previously published work and good agreement is obtained.DOI: http://dx.doi.org/10.3329/jname.v11i1.16488

Transient magneto-micropolar free convection heat and mass transfer through a non-Darcy porous medium channel with variable thermal conductivity and heat source effects

2009 ◽  
Vol 223 (10) ◽  
pp. 2341-2355 ◽  
Author(s):  
S Rawat ◽  
R Bhargava ◽  
Renu Bhargava ◽  
O A Bég
Keyword(s):  
Thermal Conductivity ◽  
Mass Transfer ◽  
Porous Medium ◽  
Free Convection ◽  
Heat And Mass Transfer ◽  
Chemical Engineering ◽  
Variable Thermal Conductivity ◽  
Transport Processes ◽  
Convection Heat ◽  
Free Convection Heat

The laminar, fully developed, transient magnetohydrodynamic (MHD) free convection heat and mass transfer of an electrically conducting micropolar fluid between two vertical plates containing a non-Darcy porous medium with heat generation/absorption and asymmetric wall temperature and concentration has been discussed in this article. A similarity transformation is used to render the problem into a system of coupled, partial, differential equations, which are solved using the finite-element method (FEM). The solutions are validated with a robust finite difference method (FDM) solver. The present work examines the effect of Darcian parameter, Forchheimer parameter, heat absorption/generation parameter, vortex viscosity parameter, buoyancy ratio parameter, magnetic parameter, and variable thermal conductivity parameter on velocity, angular velocity, temperature and concentration profiles. Space—time graphs of velocity and microrotation are also plotted to provide a better perspective of the flowfield evolution with respect to time. Applications of the study may arise in, for example, packed-bed chemical reactors, materials processing, magnetic field control of chemical engineering transport processes in filter media, purification of hydrocarbons with electromagnetic fields, etc.

scholarly journals Influence of Non-linear Boussinesq Approximation on Natural Convective Flow of a Power-Law Fluid along an Inclined Plate under Convective Thermal Boundary Condition

2019 ◽  
Vol 8 (1) ◽  
pp. 94-106 ◽  
Author(s):  
Ch. RamReddy ◽  
P. Naveen ◽  
D. Srinivasacharya
Keyword(s):  
Mass Transfer ◽  
Boundary Condition ◽  
Heat And Mass Transfer ◽  
Power Law ◽  
Convective Flow ◽  
Boussinesq Approximation ◽  
Thermal Boundary Condition ◽  
Power Law Fluid ◽  
Inclined Plate ◽  
Convective Thermal

Abstract In the present investigation, a problem of natural convective flow of a non-Newtonian power-law fluid over an inclined plate saturated in a non-Darcy porous medium is considered. Also, the nonlinear Boussinesq approximation and convective thermal boundary condition are taken into account to address heat and mass transfer phenomena of thermal systems which are operated at moderate and very high temperatures. The steady-state boundary layer equations are non-dimensionalized into non-similar form and then solved numerically by the local non-similarity method with successive linearisation method (SLM). The effects of various physical parameters on the fluid flow, heat and mass transfer characteristics are depicted graphically and analysed in detail.

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