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This article presents a numerical analysis of the water-based hybrid nanofluid comprehending CuO and Fe3O4 nanoparticles between two rotating disks. The bottom and top disks each revolve around their respective axes of rotation. The two disks are positioned apart from one another. Along with Brownian motion and thermophoresis, it is intended that the flow will be electrically conducting, thermally radiative, and chemically reactive. The heat and mass transportation are also given attention in this study since they are crucial for industry, engineering, and everyday life which include hydraulic engines, electric motors, and generators. Using the bvp4c MATLAB function, the numerical solution of the modeled problem is ascertained. The results of the current numerical solution are compared with results from published research, confirming the accuracy of our model. The results of the present analysis are presented through figures and tables. Outcomes of this analysis show that stretching factor of the lower disk upsurges the axial velocity while the radial velocity exhibits dual behavior due to the stretching factor of the lower disk. Also, the stretching factor of the upper disk reduces the axial velocity while the radial velocity exhibits dual behavior due to the stretching factor of the upper disk. The tangential velocity distribution augments with the increasing rotation parameter. In comparison to nanofluid, hybrid nanofluid has stronger effects of the embedded factors on its Nusselt and Sherwood numbers at the lower disk, whereas at the upper disk, nanofluid has more effects of the embedded factors on its Nusselt and Sherwood numbers. This research might have an impact on various gadgets, including those that use air conditioning, chemicals and electronics. It is anticipated that the findings of this study will complement previously published work as well as provide information on engineering and industrial applications. [ABSTRACT FROM AUTHOR]

The phenomenon of free convection above an isothermal vertical cone in the flow of Newtonian fluid suspended with solid nanoparticles like silver (Ag) and magnesium oxide (MgO) is numerically analyzed in this paper. Here, a convectively heated vertical cone is immersed in the infinite nanofluid with a porous medium. The fluid motion occurs due to the thermal gradient and force of gravity in the system. Energy transportation is studied with help of the empirical theory of Cattaneo–Christov. The physical effects included in the problem are heat source, stratification, chemical reaction, and motile microorganism. Further, the total entropy rate is computed. The flow, temperature, concentration, and microorganism distribution are explored in view graphical abstracts which are computed numerically by integration of the governing non-linear system of equations using the bvp4c technique. The outcomes are validated by relating them to earlier available data in the field, which is a remarkable feature of the proposed model. In this feature, an admired balance has been attained. The investigation proves that the buoyancy ratio characteristic and bioconvection Rayleigh number reduce the fluid velocity. Further, the concentration and microorganism stratification parameter effect diminish the motile microorganism and concentration distribution. [ABSTRACT FROM AUTHOR]