Heat Transfer Enhancement of MHD Natural Convection in a Star-Shaped Enclosure, Using Heated Baffle and MWCNT–Water Nanofluid

Fluids have played and still play a vital role in attaining an optimized output from industrial processes. However, due to technological advancement, fluids with high hydrothermal characteristics are required. In order overcome these challenges, researchers developed dispersed nanoparticles, which recognized as nanofluids. Various types of nanoparticles can be added base produce thermally enhanced liquids. Among these, the addition multi-walled carbon nanotubes (MWCNTs) is considered best considerable enhancement thermophysical properties stability solution. Thus, present investigation, analysis heat transfer MWCNT–water nanofluid included star-shaped cavity equipped hot rectangular baffle conducted. addition, uniform magnetic field applied along x-direction oppose convective flow generated by variations density. Mathematical formulations under assumed boundary conditions physical assumptions established form dimensionless PDEs. The finite-element-method-based software “COMSOL” used execute numerical simulations. PARADISO employed resolve non-linear system equations. effects governing parameters on velocity temperature fields presented through streamlines isotherms. Nusselt number evaluated depict impact enhancement. Changes horizontal vertical components also against Rayleigh nanoparticle volume fraction via cutline representation.