The Optimization of Boundary Layer Flow and the Role of Nanoparticles’ Radius in Thermal Performance

The investigation on magnetohydrodynamic micropolar tangent hyperbolic waterbased Al2O3 nanofluid flow over a stretching surface with the impact of thermal radiation, heat source, and convective boundary condition is discussed. This study scrutinized the significance of increasing size of nanoparticles and its impact due to the concentration and temperature gradients in the dynamics of nanofluids subjected to magnetic field. Proper transforms yield highly nonlinear differential systems, which are solved by using the bvp4c technique. The velocity profiles, temperature distribution, micro-rotation, and the skin friction factor along with the heat transfer rate have presented under the effect of various physical parameters. It is observed that the variation in the velocity and temperature profiles occurred due to the increasing size of nanoparticle and the impact of involved parameters. Furthermore, it causes an increase in heat transfer rate, while the thermal boundary layer becomes thicker with intensifying Biot number. The impact of influential parameters on physical quantities is illustrated through graphs.