Computational study of chemical reaction and activation energy on the flow of Fe3O4 -Go/water over a moving thin needle: Theoretical aspects

The consequence of Hall current on hybrid nanofluid flow by incorporating Arrhenius activation energy is examined in this study. The hybrid nanoliquid is formed by dispersing magnetite (Fe3O4) and graphene oxide (Go) nanoparticles in base liquid water (H2O). The framed partial differential equations are converted into ordinary differential equations by applying similarity variables and these reduced equations are numerically solved with the aid of fourth and fifth order Runge-Kutta-Fehlberg (RKF45) method. The impact of several involved dimensionles parameters on velocity, thermal and concentration profiles are incorporated and discussed in detaile by using suitable graphs. It is perceived that, larger values of Hall parameter increases the velocity profile. The rise in values of activation energy parameter accelerates the concentration profile. Further it is noted that drag force and mass transfer rate is decreased for higher solid volume fraction but reverse behaviour is observed in heat transfer rate.

Automated summary

This study examines the impact of Hall current on hybrid nanofluid flow by incorporating Arrhenius activation energy. By converting the framed partial differential equations into ordinary differential equations using similarity variables, and numerically solving with RKF45 method, the study shows that larger Hall parameter increases the velocity profile and higher activation energy parameter accelerates the concentration profile. Further analysis reveals the effects of dimensionless parameters on velocity, thermal, and concentration profiles.