Numerical simulation of AA7072-AA7075/water-based hybrid nanofluid flow over a curved stretching sheet with Newtonian heating: A non-Fourier heat flux model approach

Hybrid nanofluids are widely used in various engineering, manufacturing as well as bio-medical fields. Inspired from these applications, we discussed the flow of AA7072-AA7075/water-based hybrid nano-fluid over a curved stretching sheet using non-Fourier heat flux model. Additionally, heat transference is analysed for two different boundary conditions namely, Newtonian heating (NH) and constant wall temperature (CWT). The governing partial differential equations (PDEs) are reduced into ordinary differential equations (ODEs) by opting appropriate similarity transformations. Then they are numerically solved by using Runge-Kutta-Fehlberg's fourth fifth order (RKF-45) technique by adopting shooting method. Behaviour of various parameters on flow and thermal gradients are deliberated through graphs. Also, skin friction and Nusselt number are examined graphically. Results reveal that, velocity increases for higher values of curvature parameter. Thermal distribution of assumed liquid is more in Newtonian heating case when compared to common wall temperature case for diverse values of curvature parameter and thermal relaxation parameter. The upsurge in values of curvature parameter, Newtonian heating parameter and thermal relaxation parameter improves the rate of heat transfer. Novelty of analysis: With impressed thermal performances, the nanoparticles are assumed as an effective procedure of enhancing the conductivity performances of many normal liquids. On this end, many authors performed various investigations to disclose the thermal aspects of various nanoparticles like single-walled carbon nano-tubes, multi-walled carbon nanotubes (MWCNTs), copper oxide, ferrofluid, silicon dioxide etc. However, the thermal characteristics on AA7072-AA7075/water-based hybrid nanoparticles is not analyzed and presented in the literature. This theoretical analysis access the thermal mechanism of such types of AA7072-AA7075 nanoparticles to improve the heat transfer phenomenon. A comparative analysis for improvement in heat transfer is also presented as compared to the traditional viscous materials. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

The study investigates the flow and heat transfer characteristics of AA7072-AA7075/water-based hybrid nanofluid over a curved stretching sheet, showing that increasing curvature, Newtonian heating, and thermal relaxation parameters improves the heat transfer rate. Novelty lies in the thermal mechanism analysis of AA7072-AA7075 nanoparticles for enhancing heat transfer performance.