Hydrodynamic and thermal analysis of CNT-based nanofluids over rotating and vertically moving disk

The primary objective of this study is to assess the thermal and solute CNT-based MHD characteristics of nanofluid flow over a vertically moving and rotating disk under the impact of various physical effects such as viscous dissipation, source, sink and thermal radiation. Both the Buongiorno and Xue models are used to study the heat transfer features of nanofluids. Engine oil is considered as the base fluid and nanoparticles of carbon nanotubes are added to the liquid. Moreover, the Brownian motion and thermophoresis mechanisms of nanoparticles are discussed with the help of the Buongiorno model. Similarity transformations are employed to reduce the PDEs into non-linear ODEs. Numerical solutions are acquired for flow and energy transfer by using a MATLAB scheme, namely bvp4c, and the outcomes are examined in graphical and tabular form. The higher value of the magnetic parameter reduces the radial and azimuthal velocity but enhances the temperature field. Moreover, the temperature fields decline by increasing both the Prandtl number and the radiation parameter. By enhancing Brownian motion, the concentration distribution decreases while it is enhanced by increasing the thermophoresis parameter.

Automated summary

This study evaluates the thermal and solute MHD characteristics of nanofluid flow over a vertically moving and rotating disk under various physical effects, using Buongiorno and Xue models for heat transfer features and discussing Brownian motion and thermophoresis mechanisms. Numerical solutions are obtained for flow and energy transfer, showing that higher magnetic parameter reduces velocity but enhances temperature, while temperature fields decline with increasing Prandtl number and radiation parameter. Brownian motion decreases concentration distribution, while thermophoresis enhances it.