Chemically radioactive unsteady nonlinear convective couple stress Casson hybrid nanofluid flow over a gyrating sphere: Journal of Thermal Analysis and Calorimetry

Researchers and academics are interested in nanofluids because of their high heat transmission rates. The researchers develop advanced and cheap procedures for the enhancement of thermal devices and exchangers. Nanofluids are one of the advanced technology approaches to improving the thermal performance of devices. The combination of two nanoparticles of different chemical properties in a single base fluid termed a hybrid nanofluid has the advanced properties to increase heat transfer and destroy bad bacteria. For this purpose, the couple stress Casson hybrid nanofluid is examined in a time-dependent MHD quadratic heat transfer movement in a stagnation region of a revolving sphere with chemical reaction. The flow is produced by a natural rotation of the sphere, which comprises copper oxide, copper nanoparticles in hybrid nanofluid and nanofluid and blood as a common liquid. The OHAM in Mathematica is used to compute this convectional amplitude, and the shooting numerical method has been used to validate the results. The influence of the included modeling components on fluid flow, Nusselt number, energy, concentration, and the skin friction coefficient are assessed numerically and graphically. The results represent that raising values of ϕ1,ϕ2 from 0.01 to 0.02 improves the rate of heat transfer by 5.8% and 11.947%. When hybrid nanomaterial, nanomaterial, and base fluid were compared, it was discovered that hybrid nanomaterial seems to have the most efficient behavior. A comparison of the current investigation with published work is included to support the projected model. © 2023, Akadémiai Kiadó, Budapest, Hungary.