Magnetic dipole and thermal radiation effects on hybrid base micropolar CNTs flow over a stretching sheet: Finite element method approach.

• The fluid velocity decelerates with the growing values of ferromagnetic interaction parameters. • An increment in microrotation has been detected with the increasing values of ferromagnetic interaction parameter. • MWCNT greatly impacts fluid velocity and microrotation because of lower density than SWCNT. • The effect of SWCNT on the magnitude of skin friction coefficient is higher than that of the MWCNT. • The set of ordinary differential equations has been tackled numerically utilizing the finite element method. The finite element method (FEM) is applied to study the impacts of prominent parameters on microrotation, velocity, and temperature to know the characteristics of the flow of incompressible water-ethylene glycol base fluids (60 % water + 40 % ethylene glycol) with single-wall and multiwall carbon nanotube nanoparticles micropolar ferromagnetic fluid due to porous stretching surface. A magnetic dipole of significant strength together the applied magnetic field contributes to better saturation of magnetic nanoparticles. Appropriate similarity transforms are applied to acquire the ordinary differential form of the governing non-linear partial differential equations and resulting equations are discretized in the prospectus of FEM. The detailed parametric study has been carried out, the results are presented in graphical and tabular form. The increment in the ferromagnetic interaction parameter slows down the fluid velocity but it upsurges the microrotation and thermal distribution. The multiwall carbon nanotube (MWCNT) in comparison to the single-wall carbon nanotube (SWCNT) has a greater impact on velocity and microrotation profiles also single-wall carbon nanotube (SWCNT) is compared to the multiwall carbon nanotube (MWCNT) has a greater impact on the temperature profile. The validation of the MATLAB code and the numerical scheme has been verified with an excellent comparison of present results with previous ones in the existing literature. [ABSTRACT FROM AUTHOR]