Nanoparticle’s Shape Effect on Mixed Convection Heat Transfer and Flow of Carbon Nanotubes: Numerical Approach

This work is an attempt to investigate the thermal behavior of a number of different nanofluids over cone at a prescribed wall temperature (PWT). Rotating nanofluids have a plethora of applications in industries like surgical implants, cooling processes, and heat transmission in microelectromechanical systems (MEMS). Keeping in view this particular attribute of nanofluids, this study aims to produce a detailed investigation of different nanofluids, namely, single-wall carbon nanotubes (SWCNT)/kerosene oil (KO), silver/kerosene oil (KO), multi-wall carbon nanotubes (MWCNT)/mineral oil (MO), and copper oxide/mineral oil (MO) over an axially spinning cone. Highly non-linear partial differential equations are obtained using the Rivilin Erickson tensor and suitable boundary layer approximations. A new set of supposed variables is introduced to obtain ordinary differential equations. In MATLAB, the boundary value problem technique (bvp4c) was used to obtain graphical and tabulated results. The problem’s flow symmetry is examined under the influence of rotational impact, mixed convection, the Prandtl number effect, and unsteadiness impact. Additionally, shear stress symmetry and Nusselt number outcomes are investigated with varying values of distinct parameters. Kerosene-based nanofluids have high heat transfer coefficients when compared with mineral oil-based nanofluids. Moreover, the Nusselt number has increased by 55% when compared with the case of mineral oil-based nanofluids, resulting in reduced skin coefficients and a high Nusselt number.