Soret and Dufour effects on mixed convection unsteady MHD boundary layer flow over stretching sheet in porous medium with chemically reactive species

Nayak, Ajit Kumar; Panda, Satyananda; Phukan, Deva Kanta

doi:10.1007/s10483-014-1830-9

Cited by 17 publications

(12 citation statements)

References 20 publications

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“…Also, near the active walls there is reduction in heat and mass transfer. Nayak et al (2014) discussed the influence of Soret and Dofour effects on the mixed convection flow in the hydro-magnetic unsteady flow over an impermeable vertical stretching sheet in a fluid-saturated porous medium in the presence of chemical reaction. The governing partial differential equations are solved numerically by the Runge-Kutta fourth order scheme in association with the shooting method for achieving better accuracy.…”

Section: Frontiers In Heat and Mass Transfermentioning

confidence: 99%

Computational Investigation of Double-Diffusive Mixed Convective Flow in an Enclosed Square Cavity With Soret Effect

Satheesh¹,

Mohan²

2017

Frontiers in Heat and Mass Transfer

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In this study, a two-dimensional steady state double-diffusive mixed convective flow in a square cavity with Soret effect is presented. The numerical investigation is considered with two different conditions, (a) top and bottom walls move with same velocity (Uo) towards right and (b) top wall moves towards right and bottom wall moves towards left with the same velocity (Uo). The left and right walls remain stationary. The top and bottom walls are adiabatic; the left wall is maintained at high temperature and concentration. The right wall is maintained at low temperature and concentration. INTRODUCTIONThe combined effect of temperature and concentration gradients along with some externally applied forces in which heat and mass transfer occur simultaneously is known as double-diffusive mixed convection. Double-diffusive mixed convection in cavities is an area extensively investigated because of the multitude of engineering applications they are often encountered in. The aforementioned areas of research include nuclear reactors, solar collectors, cooling of electronic systems, chemical processing equipment, etc. Double-diffusive convection is also referred to as buoyancy driven flow induced by both temperature and concentration gradients. Bergman (1989) studied the influence of Soretinduced solutal buoyancy forces on the hydrodynamics and heat transfer rates of an initially uniform concentration fluid contained in an enclosure associated with natural convection. The effect of Soret phenomenon may or may not be important in natural convection. However, the Soret effect must be included in the analysis of the water-based binary fluid. Reima et al. (1993) carried out numerical studies for mixed convection in a driven cavity with a stable vertical temperature gradient. Flow is generated by the top horizontal boundary wall, which slides in its own plane at constant speed. A stabilizing externally-applied vertical temperature gradient is imposed on the system boundaries: the top wall is maintained at a higher temperature than the bottom wall. It was observed that at Ri < 1.0, in the bulk of the interior, fluids are well mixed, and temperature variations are small. For Ri > 1.0, the majority of the fluid interior is stagnant. . The findings were, that heat and mass transfer differs with the change in magnitude of the temperature and concentration gradients. These gradients decide the thermal and solutal dominant regions in the cavity. The effect of double-diffusive natural convection of water in a partially heated enclosure with Soret and Dufour effect around the density maximum is numerically analyzed by Nithyadevi et al. (2009). The temperature and concentration between the two walls are varied. They found that the rate of heat and mass transfer increases when the values of thermal Ra increase in all heating locations Frontiers in Heat and Mass TransferAvailable at www.ThermalFluidsCentral.org

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Section: Frontiers In Heat and Mass Transfermentioning

confidence: 99%

Computational Investigation of Double-Diffusive Mixed Convective Flow in an Enclosed Square Cavity With Soret Effect

Satheesh¹,

Mohan²

2017

Frontiers in Heat and Mass Transfer

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“…They solved the modeled equations numerically by applying implicit iterative finite difference method. Nayak et al [12] investigated the Soret and Dufour effects in the hydromagnetic unsteady flow by a mixed convection past a stretching sheet in a porous medium in the presence of chemical reaction. Swain et al [13] have studied the impact of heat source and chemical reaction on MHD flow of viscoelastic nanofluid over a stretching sheet in a porous medium.…”

Section: Introductionmentioning

confidence: 99%

Chemical Reaction Effects on MHD Slip Flow of Convective Nanofluid over a Vertical Plate Embedded in Porous Medium with Heat Source/Sink

Swain¹,

Parida²,

Dash³

2019

MMC_B

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In this present flow model we study the MHD flow, heat and mass transfer of an electrically conducting nanofluid past a semi-infinite vertical flat plate subject to convective boundary condition, energy dissipation, heat source/sink and chemical reaction. Using similarity transformations, we derive a set of non-linear ordinary differential equations governing the flow which are solved numerically by fourth order Runge-Kutta method with shooting technique. The velocity, temperature, concentration and nanoparticle volume fraction profiles are affected by a number of thermo-physical parameters are presented graphically. The shearing stress at the plate, rate of heat and mass transfer are also studied. The outcome of the present analysis is to regulate the Biot number to control the cooling or heating mechanism at the plate i.e. to increase/decrease the rate of heat transfer.

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“…They reported that flow velocity is accelerated by Prandtl number. Nayak et al [6] scanned the Dufour and Soret influences on chemically reactive unsteady stream past an expanding sheet. It was observed that the incre-mented values of Soret parameters enhance the skin drag magnitude.…”

Section: Introductionmentioning

confidence: 99%

Cross Diffusion Impacts on Chemically Reactive Unsteady Mass and Energy Transport Over Elongated Surface through Penetrable Medium

Malarselvi¹,

Bhuvaneswari²,

Sivasankaran³

et al. 2018

IJET

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The analysis of Dufour and Soret impacts on chemically reactive unsteady stream with molecules and energy transport in the thin fluid layer over an elongated surface rooted in a penetrable transporting agency with thermal suction/injection is scrutinized. The mathematically formulated PDEs are changed into ODEs with the application of similarity transforms. The converted ODEs are determined by Runge-Kutta method linked shooting process. Numerically computed data are graphically manifested to illustrate the domination of various parametric values. Numerical inspections are made over for local skin drag, rate of energy and solute transport.

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Soret and Dufour effects on mixed convection unsteady MHD boundary layer flow over stretching sheet in porous medium with chemically reactive species

Cited by 17 publications

References 20 publications

Computational Investigation of Double-Diffusive Mixed Convective Flow in an Enclosed Square Cavity With Soret Effect

Computational Investigation of Double-Diffusive Mixed Convective Flow in an Enclosed Square Cavity With Soret Effect

Chemical Reaction Effects on MHD Slip Flow of Convective Nanofluid over a Vertical Plate Embedded in Porous Medium with Heat Source/Sink

Cross Diffusion Impacts on Chemically Reactive Unsteady Mass and Energy Transport Over Elongated Surface through Penetrable Medium

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