Computational exploration and flow control analysis of alumina – magnetite/water-based hybrid nanofluid over a permeable Riga plate under the impact of Soret-Dufour effects

Abstract

The current study aims to analyze the behavior of a hybrid nanofluid, comprising of alumina and magnetite nanoparticles with base fluid as water, when it flows over a vertical permeable Riga-plate including the electromagnetohydrodynamic (EMHD) principles. The coupled governing equations are nonlinear and it has been simplified using appropriate non-dimensional parameters. A numerical analysis was then carried out utilizing the finite difference scheme, in particular Crank-Nicholson technique. This study primarily focuses on the significance of physical parameters such as magnetic field, permeability, volume fraction of nanoparticles, radiation, viscous dissipation, Soret-Dufour effect and chemical reaction which are analyzed through graphical illustrations. It has been observed that Soret and Dufour effects exert influence on the profiles of temperature and concentration. In addition, Viscous dissipation and radiation reinforces the temperature. The impact of chemical reaction retards the thickness of concentration boundary layer. The integration of nanoparticles with Riga-plate allows for better flow control and manipulation of heat transfer processes, makes it ideal for applications in the cooling process of electronics equipment, thermal management systems and energy production. Further, Response surface model (RSM) is demonstrated to analyze the sensitivity of permeable Riga plate with respect to various pertinent parameters. RSM explores more on the intricate interactions between the input variables and the response variables. It is also inferred that uplifting the value of magnetic parameter  and the permeability parameter  accelerates the wall shear stress. Graphical comparison made with previous studies for validating the results.