The Numerical Simulation of Double-Diffusive Mixed Convection Flow in a Lid-Driven Porous Cavity with Magnetohydrodynamic Effect

Mohan, Chander; Satheesh, A.

doi:10.1007/s13369-015-1998-x

Cited by 31 publications

(15 citation statements)

References 20 publications

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“…Recently, Mohan and Satheesh (2016) studied the fluid behavior in a two sided lid-driven cavity due to double diffusive mixed convection and MHD considering porous media. To get the solution for coupled governing equations FVM is used in association with SIMPLE and QUICK scheme for 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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“…Akar et al [19] have analyzed turbulent fluid flow around a rotating cylinder and evaluated entropy generation. In other classes of works on convection lid-driven cavities have considered porous media with no-magnetic field [20], magnetic fields in the absence of porous substance [20][21][22] and magnetic fields along with porous substrate [16,23,24].…”

Section: Introductionmentioning

confidence: 99%

MHD convection in a partially driven cavity with corner heating

2019

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The paper presents a pertinent modification to the wall-moving thermal systems (classically represented by lid-driven cavity) by introducing a partial motion of the boundary walls. The effect of partial wall motion is investigated under magnetohydrodynamic (MHD) mixed convection in the cavity filled with porous medium. The corner heating arrangement is chosen for this investigation. The heater is placed at the right-bottom corner of the cavity, whereas the halves of the adjacent sides (which are moving) of the top-left corner are utilized for cooling. The present MHD thermofluid flow in porous cavity under partially driven condition is solved numerically using Brinkman-Forchheimer-Darcy model and analyzed using heatlines, streamlines, isotherms and average Nusselt number. The detailed insights of partially driven cavity are captured for different values of Richardson number (Ri = 0.1-100), Reynolds number (Re = 10-500), Hartmann number (Ha = 0-100), Darcy number (Da = 10 −7 to 10 −3) and porosity (ε = 0.1-1.0). The result reveals that the partial wall motion and its direction have a significant impact on the thermofluid flow structures and heat transfer rate.

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“…Gaffar et al [ 22 ] observed the double-diffusive convection under the effect of heat absorption. Furthermore, Mohan et al [ 23 ] also described the influence of double-diffusive convection in a lid-driven cavity.…”

Section: Introductionmentioning

confidence: 99%

Entropy Analysis in Double-Diffusive Convection in Nanofluids through Electro-Osmotically Induced Peristaltic Microchannel

Noreen

Hussanan

2019

Entropy

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A theoretical study is presented to examine entropy generation in double-diffusive convection in an Electro-osmotic flow (EOF) of nanofluids via a peristaltic microchannel. Buoyancy effects due to change in temperature, solute concentration and nanoparticle volume fraction are also considered. This study was performed under lubrication and Debye-Hückel linearization approximation. The governing equations are solved exactly. The effect of dominant hydrodynamic parameters (thermophoresis, Brownian motion, Soret and Dufour), Grashof numbers (thermal, concentration and nanoparticle) and electro-osmotic parameters on double-diffusive convective flow are discussed. Moreover, trapping, pumping, entropy generation number, Bejan number and heat transfer rate were also examined under the influence of pertinent parameters such as the thermophoresis parameter, the Brownian motion parameter, the Soret parameter, the Dufour parameter, the thermal Grashof number, the solutal Grashof number, the nanoparticle Grashof number, the electro-osmotic parameter and Helmholtz–Smoluchowski velocity. The electro-osmotic parameter powerfully affected the velocity profile. The magnitude of total entropy generation increased as the thermophoresis parameter and Brownian motion parameter increased. Soret and the Dufour parameter had a strong tendency to control the temperature profile and Bejan number. The findings of the present analysis can be used in clinical purposes such as cell therapy, drug delivery systems, pharmaco-dynamic pumps and particles filtration.

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The Numerical Simulation of Double-Diffusive Mixed Convection Flow in a Lid-Driven Porous Cavity with Magnetohydrodynamic Effect

Cited by 31 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

MHD convection in a partially driven cavity with corner heating

Entropy Analysis in Double-Diffusive Convection in Nanofluids through Electro-Osmotically Induced Peristaltic Microchannel

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