Parametric simulation of couple‑stress nanofluid flow subject to thermal and solutal time relaxation factors

The fluid flow over a revolving disc has gained significant attention in several engineering fields due to their superior heat transfer characteristics and thermal conductivity. Some potential applications include heat exchangers, cooling systems, aerospace industry, renewable energy systems and manufacturing processes. Therefore, in proposed model, the Iron (II, III) oxide or black iron oxide along with silver nanoparticles are mixed up vacuum pump oil for the synthesis of hybrid nanofluid. Furthermore, the magnetohydrodynamics couple stress hybrid nanofluids flow with an application of Hall current and heat radiation is studied. The effects of Joule heating and Cattaneo–Christov heat-mass flux theory are also employed on the fluid flow. Motile microorganisms have the potential to strengthen the mixing and dispersion of nanoparticles within the nanofluid, resulting in more enhanced heat transport properties; that is why, they are additionally introduced to the base fluid. The modeled equations are reset into the non-dimensional lowest order form, by using the traditional Von Karman’s similarity approach. The obtained system of nonlinear differential equations is numerically resolved through parametric computation. It has been noticed that the variation of solutal and thermal time relaxation parameters drops the concentration and energy profiles of the Hnf. The heat conduction rate is amplified with the rising impact of thermal radiation.