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

Beg, OA; Prakash, J; Tripathi, D

Abstract

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.

Citation

Beg, O., Prakash, J., & Tripathi, D. (2020). Comparative study of hybrid nanofluids in microchannel slip flow induced by electroosmosis and peristalsis. Applied Nanoscience, 10, 1693-1706. https://doi.org/10.1007/s13204-020-01286-1

• Journal Article Type: Article
• Acceptance Date: Feb 10, 2020
• Online Publication Date: Mar 2, 2020
• Publication Date: May 1, 2020
• Deposit Date: Feb 10, 2020
• Publicly Available Date: Mar 2, 2021
• Journal: Applied Nanoscience
• Print ISSN: 2190-5509
• Electronic ISSN: 2190-5517
• Publisher: Springer Verlag
• Volume: 10
• Pages: 1693-1706
• DOI: https://doi.org/10.1007/s13204-020-01286-1
• Publisher URL: https://doi.org/10.1007/s13204-020-01286-1
• Related Public URLs: https://link.springer.com/journal/13204
• Additional Information: Access Information : This is a post-peer-review, pre-copyedit version of an article published in Applied Nanoscience. The final authenticated version is available online at: http://dx.doi.org/10.1007/s13204-020-01286-1