Electroosmotic modulated unsteady squeezing flow with temperature-dependent thermal conductivity, electric and magnetic field effects

Prakash, J; Tripathi, D; Beg, OA; Sharma, RK

Abstract

Modern lubrication systems are increasingly deploying smart (functional) materials. These
respond to various external stimuli including electrical and magnetic fields, acoustics, light etc.
Motivated by such developments, in the present article unsteady electro-magnetohydrodynamics
(EMHD) squeezing flow and heat transfer in a smart ionic viscous fluid intercalated between
parallel plates with zeta potential effects is examined. The proposed mathematical model of
problem is formulated as a system of partial differential equations (continuity, momenta and
energy). Viscous dissipation and variable thermal conductivity effects are included. Axial
electrical distribution is also addressed. The governing equations are converted into ordinary
differential equations via similarity transformations and then solved numerically with MATLAB
software. The transport phenomena are scrutinized for both when the plates move apart or when
they approach each other. Also, the impact of different parameters such squeezing number,
variable thermal conductivity parameter, Prandtl number, Hartmann number, Eckert number, zeta
potential parameter, electric field parameter and electroosmosis parameter on the axial velocity
and fluid temperature are analyzed. For varied intensities of applied plate motion, the electroviscous effects derived from electric double-capacity flow field distortions are thoroughly studied.
It has been shown that the results from the current model differ significantly from those achieved
by using a standard Poisson-Boltzmann equation model. Axial velocity acceleration is induced
with negative squeeze number (plates approaching, S< 0) in comparison to that of positive squeeze
number (plates separating, S>0). Velocity enhances with increasing electroosmosis parameter and
zeta potential parameter. With rising values of zeta potential and electroosmosis parameter, there
is a decrease in temperatures for

Citation

Prakash, J., Tripathi, D., Beg, O., & Sharma, R. (2022). Electroosmotic modulated unsteady squeezing flow with temperature-dependent thermal conductivity, electric and magnetic field effects. Journal of Physics: Condensed Matter, https://doi.org/10.1088/1361-648X/ac4ead

• Journal Article Type: Article
• Acceptance Date: Jan 25, 2022
• Online Publication Date: Jan 25, 2022
• Publication Date: Jan 25, 2022
• Deposit Date: Jan 24, 2022
• Publicly Available Date: Jan 25, 2023
• Journal: Journal of Physics: Condensed Matter
• Print ISSN: 0953-8984
• Electronic ISSN: 1361-648X
• Publisher: IOP Publishing
• DOI: https://doi.org/10.1088/1361-648X/ac4ead
• Publisher URL: https://doi.org/10.1088/1361-648X/ac4ead
• Related Public URLs: http://iopscience.iop.org/0953-8984
• Additional Information: Access Information : This is the Accepted Manuscript version of an article accepted for publication in Journal of Physics: Condensed Matter. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/1361-648X/ac4ead.