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Thermally developing combined magnetohydrodynamic and electrokinetic transport in narrow confinements with interfacial slip

Sarkar, Sandip and Ganguly, Suvankar and Dutta, Pradip (2016) Thermally developing combined magnetohydrodynamic and electrokinetic transport in narrow confinements with interfacial slip. In: INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 100 . pp. 451-463.

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Official URL: http://dx.doi.org/10.1016/j.ijheatmasstransfer.201...

Abstract

In this article, we investigate the combined consequences of magnetohydrodynamic forces and interfacial slip on the heat transfer characteristics of streaming potential mediated flow in narrow fluidic confinements by following a semianalytical formalism. Going beyond the celebrated Debye-Htickel linearization, we obtain a closed form analytical expression for velocity and induced streaming potential through the consistent description of finite conductance of the immobilized Stern layer. We report an augmentation in the streaming potential field as attributable to the wall slip activated enhanced electro-magnetohydrodynamic transport of the ionic species within the EDL. In particular, we demonstrate the key role of induced streaming potential in altering thermal transport and Nusselt number variation considering the concurrent interplay of hydrodynamic slip lengths, magnetic effects, viscous dissipation, and Joule heating. We also show the implications of Stern layer conductivity and magnetohydrodynamic influence on system irreversibility through entropy generation analysis due to fluid friction and heat transfer. Finally, our results have significant scientific and technological consequences in the novel design of future generation energy efficient devices and could be useful in further advancement of theory, simulation, and experimental work. (C) 2016 Elsevier Ltd. All rights reserved.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Keywords: Narrow confinement; EDL; Streaming potential; Nusselt number; Entropy generation
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Depositing User: Id for Latest eprints
Date Deposited: 20 Jul 2016 08:51
Last Modified: 20 Jul 2016 08:51
URI: http://eprints.iisc.ac.in/id/eprint/54253

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