Vol.26, No.1, 2026, pp. 101–108
https://doi.org/10.69644/ivk-2026-01-0101

DOUBLE DIFFUSIVE ELECTROCONVECTION IN ROTATING NANOFLUID SATURATED POROUS LAYER: DARCY BRINKMAN MODEL

Pushap Lata Sharma* , Mohini Kapalta

Department of Mathematics & Statistics, Himachal Pradesh University, Summer Hill, Shimla-171005, INDIA

P.L. Sharma https://orcid.org/0000-0001-5848-9214 , *email: pl_maths@yahoo.in ,

M. Kapalta https://orcid.org/0009-0005-6371-4072

 

Abstract

This research explores the impact of rotation and vertical alternating current (AC) electric fields on the onset of convective instability within a rheological dielectric nanofluid layer heated from below and saturated by a Darcy porous medium. Linear stability analysis is employed, and the system’s coupled differential equations are analytically solved under stress-free boundary conditions using the normal mode method. The study examines the influences of parameters such as the modified diffusivity ratio, AC electric Rayleigh number, nanofluid Lewis number, solutal and nanoparticle Rayleigh numbers, porosity, and Taylor number on stationary convection. Results indicate that an increasing nanofluid Lewis number, solutal and nanoparticle Rayleigh numbers, AC electric field, and modified diffusivity ratio accelerate the onset of stationary convection, while the increase of Taylor number and porosity delay it.

Keywords: • electric field • rotation • thermosolutal • nanofluid • porous medium • Darcy-Brinkman model 

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