Non-Fourier convection-diffusion process for diathermic oil-based hybrid nanofluid flow under MHD and homogeneous-heterogeneous reactions: a finite element analysis

Purpose The purpose of this study is to explore thermal enhancement in industrial engineering processes, where improving thermal performance is a key priority. Various methods are employed to optimize heat transport in fluid-based systems, with the most efficient approach being the increase of fluid thermal conductivity through the dispersion of nanoparticles. This paper aims to investigate this advanced technique for enhancing heat transfer efficiency. Design/methodology/approach A system of partial differential equations governing non-Fourier heat transfer derived from conservation laws is simplified using boundary layer approximations. The system of ODEs with transformed boundary conditions is numerically solved by the finite element method. After validation and accuracy of the computed solutions, post-processing is carried out to investigate the behavior of physical parameters and homogeneous−heterogeneous chemical reactions on flow fields. Findings The thickness of the momentum boundary layer (TMBL) can be controlled through an applied external magnetic field. Furthermore, TMBL for di-nanofluid is wider than that of mono-nanofluid. The Deborah number (which determines the elastic behavior of the fluid) has a decreasing effect on the flow of the fluid. This is because the elasticity characteristic restores the deformation in the fluid. Further, mono-nanofluid (SiC + diathermic oil) has stronger elasticity than that of di-nanofluid. An enhancement in fluid’s temperature is observed when the curvature is increased. This increasing effect on the temperature of di-nanofluid is higher than that on the temperature of mono-nanofluid. Originality/value Given the applications of diathermic oil (DO), authors are motivated to explore the dynamics of thermal and concentration transport containing silicon carbide and titanium oxide nanoparticles, in the presence of chemical reactions and magnetohydrodynamic. The DO is treated as a viscoelastic fluid, and its rheological behavior is studied by the Maxwell rheological model As DO has not been treated as a viscoelastic liquid for thermal enhancement via nanoparticles. Second, mathematical aroused in the current scenario has not yet been evaluated through finite element technique.