Unsteady mixed convective radiative nanofluid flow in the stagnation point region of a revolving sphere considering the influence of nanoparticles diameter and nanolayer

Numerous technological applications, including rotating equipment design, missile re-entry, projectile motion and fiber coating, depend on the rotational flows and heat transfer characteristics of a forced flow stream over stationary spinning bodies of revolution. In this regard, the authors have presented an analytical solution of the mixed convective, time-dependent, laminar, and incompressible MHD flow of a water-based Al2O3 nanofluid towards the stagnation region of an angularly revolving sphere. The nanofluid transport is treated as axisym-metric and possesses constant thermophysical features except for the variation in density which originates the buoyancy force. The analytical solution of this analysis has been attempted by the homotopic approach. The convergence of the homotopic approach is presented with the help of Figure. The impacts of the embedded factors on the flow profiles are presented with the help of Figures and Tables. The results showed that the ve-locities and thermal profiles of the water-based Al2O3 nanofluid have been significantly enhanced by the volume fraction of an Al2O3 nanoparticle. The increasing nanoparticle diameter declines the thermal scenario while the nonlinear thermal radiation parameter and ratio of the liquid and nanolayer conductivity are enhanced the thermal profiles of the water-based Al2O3 nanofluid.