*Article* **Mathematical Modelling of Ree-Eyring Nanofluid Using Koo-Kleinstreuer and Cattaneo-Christov Models on Chemically Reactive** *AA***7072-***AA***7075 Alloys over a Magnetic Dipole Stretching Surface**

**Zahir Shah 1, Narcisa Vrinceanu 2,\*, Muhammad Rooman 1, Wejdan Deebani <sup>3</sup> and Meshal Shutaywi <sup>3</sup>**


**Abstract:** In the current study, since nanofluids have a high thermal resistance, and because non-Newtonian (Ree-Eyring) fluid movement on a stretching sheet by means of suspended nanoparticles *AA*7072-*AA*7075 is used, the proposed mathematical model takes into account the influence of magnetic dipoles and the Koo-Kleinstreuer model. The Cattaneo-Christov model is used to calculate heat transfer in a two-dimensional flow of Ree-Eyring nanofluid across a stretching sheet, and viscous dissipation is taken into account. The base liquid water with suspended nanoparticles *AA*7072-*AA*7075 is considered in this study. The PDEs are converted into ODEs by exhausting similarity transformations. The numerical solution of the altered equations is then performed utilising the HAM. To examine the performance of velocity, temperature profiles, concentration profiles, skin friction, the Nusselt number, and the Sherwood number, a graphical analysis is carried out for various parameters. The new model's key conclusions are that the *AA*7075 alloy outperforms the *AA*7072 alloy in terms of thermal performance as the volume fraction and ferro-magnetic interaction constraint rise. Additionally, the rate of heat transmission and the skin friction coefficient improve as the volume fraction rises.

**Keywords:** Ree-Eyring nanofluid; magnetic dipole; viscous dissipation; Cattaneo-Christov model; Koo-Kleinstreuer model; chemical reaction
