Electroosmosis modulated periodic membrane pumping flow and particle motion with magnetic field effects

Bhandari, DS, Tripathi, D and Beg, OA ORCID: https://orcid.org/0000-0001-5925-6711 2022, 'Electroosmosis modulated periodic membrane pumping flow and particle motion with magnetic field effects' , Physics of Fluids, 34 .

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Abstract

Theoretical studies of micro-electro-mechanical systems (MEMS) provide an important insight into the mechanisms and optimization of such devices for a range of applications including biomedical and chemical engineering. Inspired by emerging applications of microfluidics, unsteady viscous flow in a microchannel with periodic membrane pumping modulated by electro-magnetohydrodynamics, is analysed in a mathematical framework. The membrane kinematics induce the pressure inside the microchannel where electric field enhances the capability of pumping flow rate. This model is formulated based on the Navier–Stokes equations, Poisson equation and the Maxwell electromagnetic equations and further simplified using the lubrication approximations and Debye-Hückel linearization. The transformed dimensionless conservation equations under appropriate boundary conditions are analytically solved and further illustrated the graphical results through MATLAB (2019b) software. From the computational results, it is found that the Hartmann number enhances the fluid pressure uniformly throughout the microchannel, while electric field parameter enforces the direction of pressure-driven flow. Time-averaged flow rate exhibits a linear decay with axial pressure gradient and it is strongly elevated with electric field parameter whereas it is weakly increased with EDL thickness parameter. It is further observed that fluid is driven unidirectionally by the 2 membrane contractions via a particle tracking simulation method. This study is relevant to provide the parametric estimation in designing the magnetic field-based microfluidics devices for microlevel transport phenomena.

Item Type: Article
Additional Information: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in D. S. Bhandari, Dharmendra Tripathi, and O. Anwar Bég , "Electro-osmosis modulated periodic membrane pumping flow and particle motion with magnetic field effects", Physics of Fluids 34, 092014 (2022) https://doi.org/10.1063/5.0111050 and may be found at https://aip.scitation.org/doi/10.1063/5.0111050?af=R&feed=most-recent
Schools: Schools > School of Computing, Science and Engineering
Journal or Publication Title: Physics of Fluids
Publisher: AIP Publishing
ISSN: 1070-6631
Depositing User: OA Beg
Date Deposited: 14 Sep 2022 14:46
Last Modified: 07 Oct 2022 08:00
URI: https://usir.salford.ac.uk/id/eprint/64695

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