Nonlinear convection unsteady flow of electro-magnetohydrodynamic Sutterby hybrid nanofluid in the stagnation zone of a spinning sphere

The heat transfer characteristics of Sutterby hybridized nanofluid flow around a spinning sphere in electro-magnetohydrodynamic nonlinear convective unsteady stagnation point flow are investigated under the influence of convective heating circumstances and quadratic thermal radiation flux. Initially, the AA7072/methanol nanofluid is created by dispersing AA7072 nanoparticles into the methanol. The suitable AA7072 + AA7075/methanol hybrid nanofluid is then created by mixing AA7075 with AA7072/methanol. The governing equations are initially built as partial differential equations, which are subsequently converted to ordinary differential equations by using a similarity transmutation technique. In the study, the numerical technique of the bvp4c solver in Matlab is used. Physical factors' effects on temperature, concentration, and primary and secondary velocity profiles have been studied. As a result of greater unsteadiness, the magnetic field, and Sutterby fluid parameters, the flow of AA7072/methanol nanofluid and (AA7072 + AA7075)/ methanol hybrid nanofluid in the flow region moves quickly in the primary direction and slowly in the rotating direction. The result also demonstrates that a rise in the thermal radiation constraint, temperature ratio parameter, magnetic field constraint, electric field constraint, phi(AA7072), and phi(AA7075) causes a rise in the temperature distribution of the (AA7072 + AA7075)/methanol hybrid nanofluid and the AA7072/methanol nanofluid. Furthermore, the strongest enhancement in heat transmission rate happens at a volumetric fraction of 4% of (AA7072 + AA7075) nanoparticles and AA7072 nanoparticles (i.e., increased by 5.135827% and 4.370679% when compared with ordinary fluid, respectively). The findings of the study have implications for nano-coating spin processing in the chemical engineering industry, spray applications of agricultural chemicals, drag reducers in pipe flows, and the production of domestic cleaning products.

Automated summary

This study investigates the heat transfer characteristics of Sutterby hybridized nanofluid flow around a spinning sphere in electro-magnetohydrodynamic nonlinear convective unsteady stagnation point flow, considering the influence of convective heating circumstances and quadratic thermal radiation flux. Different nanofluids, AA7072/methanol and AA7072 + AA7075/methanol, were created and their flow behavior was analyzed. The results show that the flow of the nanofluids moves quickly in the primary direction and slowly in the rotating direction due to the unsteadiness, magnetic field, and Sutterby fluid parameters. Furthermore, an increase in thermal radiation constraint, temperature ratio parameter, magnetic field constraint, electric field constraint, and nanoparticle volumetric fraction leads to an increase in the temperature distribution.