Forced convection flow of water conveying AA7072 and AA7075 alloys-nanomaterials on variable thickness object experiencing Dufour and Soret effects

Hybrid nanofluids containing titanium alloy particles have a large class of applications in industrial plastics and soaps, microsensors, aerospace material designs, optical filters, nanowires, surgical implants, and a variety of biological applications. This paper presents a mathematical analysis of Soret and Dufour impacts on the radiative flow through a thin moving needle of binary hybrid alloys nanoparticles. The transformed ordinary differential equations are solved numerically using the built-in function, bvp4c, in MATLAB software. The influences of all relevant parameters are shown in figures and tables. Two outcomes are developed for a precise range of the velocity ratio parameter. In particular, dual solutions are obtained when the needle and the fluid move in the opposite directions, while the solution is unique when they move in the same direction. The outcomes disclose that addition of nanoparticles into the base fluid upsurges the shear stress and the Nusselt number while decreasing the Sherwood number. Meanwhile, an upsurge in the needle size results in an uplift of the temperature and the concentration for the upper branch solution, whereas the velocity declines.