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

• Published in: Journal of molecular liquids 2021-08, Vol.335, p.116103, Article 116103
• Main Authors: Madhukesh, J.K., Naveen Kumar, R., Punith Gowda, R.J., Prasannakumara, B.C., Ramesh, G.K., Ijaz Khan, M., Ullah Khan, Sami, Chu, Yu-Ming
• Format: Article
• Language: English
• Subjects: Cattaneo-Christov heat flux; Curved stretching sheet; Hybrid nanofluid; Newtonian heating
• ISSN: 0167-7322; 1873-3166
• DOI: 10.1016/j.molliq.2021.116103

•Mathematical formulation is developed using non‐Fourier heat flux model.•Water with aluminium alloy nanoparticles flow over stretching sheet is examined.•Thermal distribution is compared between Newtonian heating and common wall cases. 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 nanofluid 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.