MHD radiative natural convective heat transfer enhancement for Casson nanofluid flow on a horizontal circular cylinder

• Published in: Journal of computational science Vol. 78; p. 102257
• Main Authors: Shoaib, Muhammad, Javed, Tariq
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.06.2024
• Subjects: Casson nanofluid; Keller-Box method; MHD flow; Sensitivity analysis; Thermal radiation; MHD flow; Thermal radiation; Sensitivity analysis; Casson nanofluid; Keller-Box method
• ISSN: 1877-7503
• DOI: 10.1016/j.jocs.2024.102257

The current numerical analysis investigates the sensitivity of heat transfer enhancement in the magnetohydrodynamic radiative natural convection flow of a Casson nanofluid over a cylinder, which has significant ramifications for different fields of science, e.g., biomedical devices, aerospace engineering, nanofluid-based cooling systems, energy harvesting devices, and drag reduction in marine engineering. The effects of numerous physical parameters on heat transfer characteristics are investigated using numerical and statistical simulations. Here methanol is taken as the base Casson fluid, while enhancement is achieved by introducing the nanoparticles such as graphite oxide, along with single-wall carbon nanotubes and multi-walled carbon nanotubes. The transformed governing differential equations are numerically solved using a second-order accurate implicit finite difference scheme known as the Keller-Box technique. To conduct the sensitivity analysis RSM is used to explore the impact of various physical quantities on heat transfer. The influence of Nusselt number (Gr−1/5Nu) and skin friction (Gr1/5Cf) against various physical quantities associated with the behaviour of Casson nanofluid flow are shown in terms of graphs and tables. One of the key findings is that an increase in the Casson parameter leads to a reduction in Gr1/5Cf and an increase in the Gr−1/5Nu. Moreover, among the nanoparticles studied, multi-walled carbon nanotubes prove to be the most effective in enhancing heat transfer. •The sensitivity of heat transfer enhancement in magnetohydrodynamic (MHD) radiative natural convection flow of a Casson nanofluid over a cylinder using the Response surface methodology (RSM).•The Keller-Box method has been utilized to find the solution of the governing partial differential equations•Sensitivity analysis of flow control parameters have been discussed by suing Response Surface Methodology•Skin friction is more sensitive to the Casson parameter as compare to the magnetic parameter and thermal radiation parameter•Nusselt number is more sensitive to the thermal radiation parameter as compared to the magnetic parameter and Casson parameter