Investigation of thermal stratification with velocity slip and variable viscosity on MHD flow of Al2O3−Cu−TiO2/H2O nanofluid over disk

Abstract

The thermal performance of nanofluids, which include a base fluid and three kinds of suspended nanosized particles, is unparalleled. In this work, we analyzed the impact of many parameters on coolant applications, including MHD stagnation point flow, ternary hybrid nanofluid, viscous dissipation, variable viscosity, thermal stratification, and velocity slip conditions. Researchers synthesized ternary hybrid nanoparticles by combining Al2O3), (Cu), (TiO2) and then investigated their behavior in the presence of a symmetrically stretched disc in H2O. Because of its implications for heat transmission, the study of flow across a stretched disc is crucial to the investigation of momentum and thermal boundary layers. Numerous sectors and areas of technology will greatly benefit from this study. Similarity transformation is used to convert the PDEs into an ODE system, which can then be numerically solved using the shooting technique and the RKF scheme. The acquired results show remarkable consistency with earlier findings in certain circumstances, with an estimated relative error of 0%. The temperature profile drops as the value of the magnetic parameter rises, whereas the velocity rises as a result of the rise in magnetic parameters. Nusselt number improvements of around 8.4% for nanofluids, 16.8% for hybrid nanofluids, and 38.05% for ternary hybrid nanofluids are seen when the strength of the parameter S is raised from 2.0 to 2.4 compared to regular fluids. For an accurate prediction of how Al2O3-Cu-TiO2/ H2O will flow and how it will heat up, physical factors must be included in the analysis.

Keywords

• Stagnation point
• MHD
• Ternary hybrid nanofluidics
• Velocity slip
• Thermal stratification
• Variable viscosity