부산대학교 도서관

The main theme of this research is to deliberate the irreversibility aspects of spinning nanofluid (PEG-H2O / ZrO2) and hybrid (PEG-H2O / ZrO2–MgO) nanofluid towards a movable sheet. Here a mixture of polyethylene glycol and water is utilised as a continuous phase fluid. Two different nanoparticles are considered, i.e., zirconium dioxide (ZrO2) and magnesium oxide (MgO). The heat transfer behaviour is examined and modelled subject to viscous dissipation, heat source and heat flux. Furthermore, the entropy generation problem is addressed by the second law of thermodynamics. Nonlinear dimensionless differential systems are developed by suitable variables. The given dimensionless systems are solved using numerical techniques (ND-solve method). Effects of influential variables on fluid flow, temperature, Bejan number and entropy rate for both PEG-H2O / ZrO2 and PEG-H2O / ZrO2–MgO fluids are graphically examined. A higher approximation of volume fractions rises the velocity profile, while reverse impact is seen for the Bejan number. An increment in rotation variable corresponds to increased velocity. A similar scenario is seen for the thermal field and entropy rate through the radiation effect. An opposite impact is seen for the Bejan number and entropy rate through the Brinkman number. An augmentation in temperature is seen for the Eckert number. Furthermore, we noticed that heat transport in a hybrid nanofluid (PEG-H2O / ZrO2–MgO) is higher than that for the nanofluid (PEG-H2O / ZrO2). [ABSTRACT FROM AUTHOR]