Investigation of thermal enhancement in non-Newtonian fluid with hybrid micro-structures in an enclosure

摘要

Enhancement in the thermal performance of the fluids with micro-structures via hybrid nanoparticles is highly appreciated since the efficiency of the thermal system depends upon the thermal conductivity of the fluid being used as coolant or working fluid. Dispersion of CuO and Al_2O_3 in the fluid exhibiting micro- inertia, vortex viscosity and couple stress effects is studied. The main motivation behind investigation of this fluid with enhanced properties is that these fluids are encountered at industry and engineering processes. Hybrid thermo-physical relations and conservation of momenta, energy and mass are simultaneously used for the development of models to investigate the effectiveness of thermal conductivity of fluid with micro-structures (such fluids are called micropolar fluid). Two-dimensional models are set into their dimensionless forms in view of the importance of dimensional analysis. Further, finite volume method (FVM) is implemented to find numerical solution. The simulations are recorded in the form of graphical data and their outcomes are discussed. The performed study concludes a significant rise in thermal performance of the working fluid via hybrid micro-structure constituents. The behavior of vortex viscosity on fluid velocity and angular motion is investigated under various parametric values.