Investigation of thermal efficiency in SWCNT and MWCNT hybrid nanofluids under transient convection between parallel plates

Transient magnetohydrodynamic convection, that entails the flow of single wall carbon nanotube (SWCNT) and multiwall carbon nanotube (MWCNT)/water (H2O) hybrid nanofluid between two parallel plates, has several applications in science and engineering. In particular, coatings for wires, fibre sheets, optical fibres, photoelectric devices, and solar cells are designed and manufactured. The effects of an external magnetic field on fluid transport properties are investigated. The thermal efficiency behavior of various nanoparticle form factors is investigated. This study looks into flow concerns such as convection, hybrid nanofluid properties, and the applied magnetic field. Fluid flow is represented mathematically by coupled partial differential equations with specified boundary circumstances. The finite difference method is being used in conjunction with the appropriate analogous transformations to convert the governing equations into dimensionless form. Better heat transfer is obtained when hybrid nanoparticles are added to base liquid as opposed to base fluid and nanofluid alone, according to simulations for different physical parameters in the model. Greater values of the velocity ratio and combination of convection parameters result in a rise in the hybrid nanofluid's velocity. As the magnetic parameter and volume fraction of SWCNT-MWCNT grows, temperature of hybrid nanofluid rises sharply.