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Fully developed thermal transport in combined pressure and electroosmotically driven flow of nanofluid in a microchannel under the effect of a magnetic field

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Abstract

This paper critically analyzes, for the first time, the effect of nanofluid on thermally fully developed magnetohydrodynamic flows through microchannel, by considering combined effects of externally applied pressure gradient and electroosmosis. The classical boundary condition of uniform wall heat flux is considered, and the effects of viscous dissipation as well as Joule heating have been taken into account. Closed-form analytical expressions for the pertinent velocity and temperature distributions and the Nusselt number variations are obtained, in order to examine the role of nanofluids in influencing the fully developed thermal transport in electroosmotic microflows under the effect of magnetic field. Fundamental considerations are invoked to ascertain the consequences of particle agglomeration on the thermophysical properties of the nanofluid. The present theoretical formalism addresses the details of the interparticle interaction kinetics in tune with the pertinent variations in the effective particulate dimensions, volume fractions of the nanoparticles, as well as the aggregate structure of the particulate system. It is revealed that the inclusion of nanofluid changes the transport characteristics and system irreversibility to a considerable extent and can have significant consequences in the design of electroosmotically actuated microfluidic systems.

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Authors and Affiliations

  1. TATA Global R&D Division, Jamshedpur, India

    Sandip Sarkar & Suvankar Ganguly

  2. Department of Mechanical Engineering, Indian Institute of Science Bangalore, Bangalore, 560012, India

    Sandip Sarkar

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  1. Sandip Sarkar
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  2. Suvankar Ganguly
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Correspondence to Suvankar Ganguly.

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Sarkar, S., Ganguly, S. Fully developed thermal transport in combined pressure and electroosmotically driven flow of nanofluid in a microchannel under the effect of a magnetic field. Microfluid Nanofluid 18, 623–636 (2015). https://doi.org/10.1007/s10404-014-1461-4

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  • DOI: https://doi.org/10.1007/s10404-014-1461-4

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