Significance low oscillating magnetic field and Hall current in the nano-ferrofluid flow past a rotating stretchable disk

The present investigation involves the Hall current effects past a low oscillating stretchable rotating disk with Joule heating and the viscous dissipation impacts on a Ferro-nanofluid flow. The entropy generation analysis is carried out to study the impact of rotational viscosity by applying a low oscillating magnetic field. The model gives the continuity, momentum, temperature, magnetization, and rotational partial differential equations. These equations are transformed into the ODEs and solved by using bvp4c MATLAB. The graphical representation of arising parameters such as effective magnetization and nanoparticle concentration on thermal profile, velocity profile, and rate of disorder along with Bejan number is presented. Drag force and the heat transfer rate are given in the tabular form. It is comprehended that for increasing nanoparticle volume fraction and magnetization parameter, the radial, and tangential velocity reduce while thermal profile surges. The comparison of present results for radial and axial velocity profiles with the existing literature shows approximately the same results.

Automated summary

This study investigates the impact of a low oscillating magnetic field on rotational viscosity through entropy generation analysis, as well as the effects of Hall current, Joule heating, and viscous dissipation on Ferro-nanofluid flow over a low oscillating stretchable rotating disk. The model transforms partial differential equations into ODEs and solves them using bvp4c MATLAB, presenting the influence of parameters on thermal and velocity profiles. The results show that increasing nanoparticle volume fraction and magnetization parameter lead to decreased radial and tangential velocity, while the thermal profile increases. Comparisons with existing literature show similar results for radial and axial velocity profiles.