Numerical Investigation of a Rotating Magnetic Field Influence on Free Convective CNT/Water Nanofluid Flow within a Corrugated Enclosure

This paper emphasizes the effect of applying a rotating magnetic field on the natural convective flow of CNT/Water nanofluid inside a corrugated square cavity differentially heated through its sidewalls, while the upper and lower boundaries are supposed to be perfectly insulated. The aim of this study is to highlight the impact of a large variety of parameters, namely Hartman number, frequency of rotation, Rayleigh number, nanoparticles volume fraction, and corrugation aspect ratio on the flow behaviour and thermal transport characteristics. The governing non-linear coupled differential equations are solved by using the finite element technique. Outcomes indicated that the thermal energy exchange is improved with the Rayleigh number increment and nanoparticles loading, while it is weakened with the rising of Ha, ascribed to the Lorentz force opposition to buoyancy. Moreover, enlarging the corrugation aspect ratio causes the apparition of stagnant fluid zones and the rate of heat transfer is reduced as a result.

Automated summary

This paper focuses on the effect of a rotating magnetic field on natural convective flow of CNT/Water nanofluid in a corrugated square cavity with differential heating on its sidewalls and perfectly insulated upper and lower boundaries. The study aims to highlight the impact of various parameters, such as Hartman number, frequency of rotation, Rayleigh number, nanoparticles volume fraction, and corrugation aspect ratio, on flow behavior and thermal transport characteristics. The governing equations are solved using the finite element technique. Results show that thermal energy exchange is improved with increasing Rayleigh number and nanoparticles loading, while it is weakened with higher Ha due to Lorentz force opposing buoyancy. Increasing corrugation aspect ratio leads to stagnant fluid zones and a reduction in heat transfer rate.