Abstract

The dynamics of nanofluid by considering the role of imposed Lorentz forces, thermal radiations and velocity slip effects over a vertically convectively heated surface is a topic of huge interest. Therefore, the said study is conducted for Al2O3-H2O nanofluid. Mathematical modelling of the problem is done via nanofluid effective correlations comprising the influences of freezing temperature, molecular diameter and similarity transformations. The results for multiple parameters are plotted and provide comprehensive discussion. From the analysis, it is examined that Al2O3-H2O nanofluid motion drops by strengthening Lorentz forces. The temperature in the nanofluid (Al2O3-H2O) is improved by inducing viscous dissipation effects (Ec number), surface convection (Biot number) and thermal radiations (Rd). Moreover, the shear stresses at the surface decreased due to higher magnetic field effects and rises due to velocity slip. A significant rise in Local Nusselt number is observed due to thermal radiations and Biot effects. Finally, enhanced heat transport mechanism in Al2O3-H2O is examined than a conventional liquid. Therefore, nanofluids are better for industrial applications and the uses of conventional liquids are limited due to low thermal conductivity.

Highlights

  • The dynamics of nanofluid by considering the role of imposed Lorentz forces, thermal radiations and velocity slip effects over a vertically convectively heated surface is a topic of huge interest

  • Analysis of the nanofluids saturated by A­ l2O3 nanoparticles became very popular due to their multiple applications in various industries. Fluid dynamists focused their attention to examine the characteristics of various nanofluids under various flow scenario including finite or semi-infinite flow regions

  • The decrement in the fluid motion due to imposed magnetic field effects and increment in the temperature against convective condition are determined in the analysis

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Summary

Introduction

The dynamics of nanofluid by considering the role of imposed Lorentz forces, thermal radiations and velocity slip effects over a vertically convectively heated surface is a topic of huge interest. The decrement in the fluid motion due to imposed magnetic field effects and increment in the temperature against convective condition are determined in the analysis. They conducted numerical analysis for the fluid dynamics and provided the graphical results with comprehensive discussion against the various flow parameters.

Results
Conclusion
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