A comparative study of a hybrid nanofluid on a melting stretching surface using different nanoparticle shapes.

Mahanta, Chandralekha; Sharma, Ram Prakash

This article is motivated by the effect of nanoparticle shapes on fluid motion and heat transmission across melting heat-stretchable impermeable surfaces. Thus, the impact of three different nanoparticle shapes (sphere, cylinder and lamina) at different volume fractions for two nanoparticles, i.e., Fe 3 O 4 and MgO , in the presence of three base fluids ( H 2 O , methanol , engine oil ) is investigated. The system of nonlinear partial differential equations (PDEs) is reduced to a set of ordinary differential equations (ODEs) using suitable local similarity variables. To validate the theoretical findings of this investigation, the Runge–Kutta–Fehlberg method is used and MATLAB's inbuilt program bvp4c is employed through which graphical outputs are deliberated to show the impact of nanoparticles on momentum and energy domain. This study shows that the lamina shape of MgO - Fe 3 O 4 / engine oil has a major impact on Θ ξ with increasing φ 1 , φ 2 . Due to the stronger thermal conductivity of MgO lamina-shaped nanoparticles compared to other nanoparticle shapes within the flow region, the velocity profile increases with the augmentation of φ 1 and φ 2 . MgO - Fe 3 O 4 / H 2 O exhibits a more significant impact than the others.

NANOPARTICLES; IRON oxides; THERMAL conductivity; ORDINARY differential equations; NANOFLUIDS; NONLINEAR differential equations; PARTIAL differential equations

Journal of Thermal Analysis & Calorimetry, 2023, Vol 148, Issue 23, p13655

1388-6150

Academic Journal

10.1007/s10973-023-12621-3