Radiation Effects on Dissipative Magnetohydrodynamic Couette Flow in a Composite Channel

Vyas, Paresh; Srivastava, Nupur

doi:10.5560/zna.2013-0038

Cited by 6 publications

(3 citation statements)

References 23 publications

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“…Umavathi and Shekar 23 considered transient mixed convective heat transfer in a corrugated composite channel with a porous insert. Vyas and Srivastava 24 examined radiative MHD Couette flow in a composite channel. Yadav 25 studied the slow motion of a porous cylindrical shell in a concentric cylindrical cavity.…”

Section: Introductionmentioning

confidence: 99%

Differential transform method for couple stress fluid flow in a channel with a porous base

Vyas

Gajanand

2022

Heat Trans

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The paper presents an application of the semi‐analytical differential transform method (DTM) to thermofluidics of generalized Couette flow of couple stress fluid inside a composite channel. The channel comprises a fluid‐saturated porous layer and a clear fluid region. The flow is caused by a uniformly favorable pressure gradient applied at the mouth of the channel and the shear of the moving upper wall of the channel. The matching conditions are taken such that the velocity, temperature, and respective gradients are continuous at a clear fluid–porous medium. The problem is novel because this is the first mathematical endeavor to treat fluidic systems involving composite channels. Besides the mathematical rigor, it presents an analysis of thermodynamic irreversibility and other quantities of interest, viz, skin friction and Nusselt number. The results derived from DTM are compared with those obtained by exact solution showing excellent agreement. The plots and tables are drawn and discussed.

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Section: Introductionmentioning

confidence: 99%

Differential transform method for couple stress fluid flow in a channel with a porous base

Vyas

Gajanand

2022

Heat Trans

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“…Vyas and his co-authors [9][10][11][12][13][14][15] investigated entropy generation in various thermo-fluidic configurations. Chinyoka and Mankinde [16] presented an entropy generation analysis for an unsteady channel flow.…”

Section: Introductionmentioning

confidence: 99%

Dual Entropy Regime in Channel Flow Subjected to Temperature Dependent Convection Mechanism

Vyas¹,

Khan²

2021

IJHT

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The central stimuli of this brief note is to underscore the effect of the temperature dependent convection coefficient that give rise to a dual temperature regime facilitating dual entropy distribution. In order to avoid unwarranted complexities, a simple geometry of shear flow in a channel is considered. The energy equation amenable to an analytic solution is simulated to extract the desired numerical findings in as much as for what parameters’ values, the temperature has dual distribution /does not yield temperature distribution at all. In fact, a range of parameter values have been worked out for which dual temperature regime exists or not. The plots of entropy generation number Ns also show the dual regime. The findings reveal a qualitative and quantitative difference in dual systems of temperature and entropy. It further underlines that the thermal systems with the idealized uniform heat transfer coefficient may be far distinct from actual behaviour and even weak temperature dependence of convection coefficient need due attention while designing a system.

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“…The thermal characteristics at clear fluid-porous interface are important to understand numerous processes like pollutant dispersion in aquifers, environment transport processes, separation processes in chemical industry, flow past porous scaffolds in bioreactors, drying process, and so forth. Many authors have investigated Couette flow for variety of configurations [20][21][22][23][24][25]. The laminarity of channel flow is a pertinent issue and therefore many numerical and laboratory studies have been devoted on the channel flow regime (clear fluid channel and porous medium channel) to be laminar.…”

Section: Introductionmentioning

confidence: 99%

Entropy Analysis for MHD Generalised Couette Flow in a Composite Duct

Vyas

Ranjan

2015

Journal of Industrial Mathematics

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This paper presents entropy analysis of electrically conducting Newtonian fluid flow inside a horizontal composite duct. The upper impermeable wall of the duct moves with a uniform velocity while the lower wall is porous strata of finite thickness with impermeable bottom. The upper wall and the impermeable bottom are at constant temperature but at different temperatures. The duct is divided into two regions: Region I of clear fluid and Region II of fluid saturated porous layer. Momentum and thermal regimes for clear and porous regions are matched at clear fluid-porous interface by employing suitable matching conditions. The governing equations are solved analytically. Analytical solutions obtained for velocity and temperature are utilized to compute entropy generation. The effects of pertinent parameter on temperature distribution, entropy generation, and Bejan number are portrayed graphically and discussed.

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Radiation Effects on Dissipative Magnetohydrodynamic Couette Flow in a Composite Channel

Cited by 6 publications

References 23 publications

Differential transform method for couple stress fluid flow in a channel with a porous base

Differential transform method for couple stress fluid flow in a channel with a porous base

Dual Entropy Regime in Channel Flow Subjected to Temperature Dependent Convection Mechanism

Entropy Analysis for MHD Generalised Couette Flow in a Composite Duct

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