Electromagnetohydrodynamic unsteady flow with entropy generation and hall current of hybrid nanofluid over a rotating disk: An application in hyperthermia therapeutic aspects

The objective of this article is to explore entropy generation in electromagnetohydrodynamic (EMHD) hybrid nanofluid flow across an unsteady rotating disk in the presence of Hall current, thermal radiation and viscous dissipation. In the present physical model, an innovative group of nanofluid model known as the hybrid nanofluid is being used, which is made of silver ( A g ) and ferrosoferric oxide ( F e 3 O 4 ) with blood. The nonlinear differential equations are transformed into ordinary differential equations using suitable self-similarity variables, which are obtained using the homotopy perturbation technique (HPM). When compared to the numerical technique (Runge-Kutta method), the homotopy perturbation method (HPM) yields a more accurate and reliable conclusion. The graphical outcomes are portrayed for velocities, temperature, volume fractions, entropy generation, Bejan number, skin friction and Nusselt number with various values of dynamic parameters. The higher values of electric field enhance the radial and azimuthal velocities whereas the opposite nature for a magnetic field parameter. Temperature profile enhances by varying magnetic and electric field parameters. The entropy generation rises for higher values of radiation, magnetic and electric fields. This theoretical model consists of EMHD and thermal radiation cases through blood flow and it plays a significant role in biomedical applications especially radiofrequency ablation (RFA), magnetic resonance imaging (MRI), cancer therapy and tumor therapy.