Comparative study of hybrid nanofluids in microchannel slip flow induced by electroosmosis and peristalsis

Beg, OA ORCID:, Prakash, J and Tripathi, D 2020, 'Comparative study of hybrid nanofluids in microchannel slip flow induced by electroosmosis and peristalsis' , Applied Nanoscience, 10 , pp. 1693-1706.

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In this paper, a mathematical model is developed to investigate the electroosmotic flow of hybrid nanoliquids (containing dissimilar nanoparticles) through an asymmetric microchannel which is moving sinusoidally with constant wave velocity under an axial electrical field. The effects of Joule heating are included. Maxwell and Brinkmann correlations are employed for nanoliquid thermal conductivity and viscosity. To study the performance of hybrid nanofluids, a selection of nanofluids is examined with water as the base fluid which is doped with titania, alumina or copper metallic nanoparticles. The boundary conditions include velocity slip and thermal slip at the microchannel walls. The Debye-Hückel linearization is employed. Numerical computations for velocity, pressure gradient and temperature fields are executed in the MATLAB bvp4c routine. The influence of selected physical parameters on the flow characteristics, pumping characteristics, and temperature distribution are computed. Pressure gradient is elevated with stronger buoyancy i.e. higher thermal Grashof number and also electroosmosis parameter whereas it is suppressed with greater velocity slip and thermal slip parameters. Axial flow is strongly accelerated with increasing Joule heating parameter and velocity slip. Periodic behavior is observed for axial pressure gradient for all three metallic nanoparticles due to the sinusoidal nature of the pumping. With increasing Brinkman number (dissipation parameter), axial pressure gradient is decreased for alumina (Al2O3). Temperature is strongly increased with greater Joule heating parameter across the microchannel width for Cu-water nanoliquid. Temperature is increased for (Al2O3)-water nanofluid in the left microchannel half space with increasing thermal Grashof Number whereas it is decreased in the right half space. Temperatures are enhanced for titania TiO2 -water nanoliquid in the left half space with greater velocity slip parameter whereas they are diminished in the right half space. The present analysis is relevant to bio-inspired electrokinetic nanofluid micropump designs and emerging nanomedicine technologies.

Item Type: Article
Schools: Schools > School of Computing, Science and Engineering
Journal or Publication Title: Applied Nanoscience
Publisher: Springer
ISSN: 2190-5509
Related URLs:
Depositing User: OA Beg
Date Deposited: 10 Feb 2020 09:36
Last Modified: 16 Feb 2022 03:59

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