Efficacy of diverse structures of wavy baffles on heat transfer amplification of double-diffusive natural convection inside a C-shaped enclosure filled with hybrid nanofluid

Indeed, C-shaped cavity is a unique feature that invites most favorable applications include cooling of electronic devices, design of heat sink devices etc. Double-diffusive natural convection (DDNC) plays a ubiquitous role in enormous industrial manufacturing processes. The second law analysis is important so as to explore the role of entropy optimization in specific thermal systems. Keeping such relevance in mind, this article is framed to fact-find on DDNC impact on fluid flow, heat and mass transfer inside C-shaped enclosure filled with hybrid nanofluid and emplacing two wavy baffles. The finite element method is the instrumental to devise a well-defined solution of the governing equations. The precise details of the outcomes of the present study are that streamlines intensify by 245.64%, 141.65%, 69.77%, 23.91% with rise in buoyancy ratio, Rayleigh number Ra, Lewis number and amplitude of wavy baffle respectively while that whittles down by 25.4% with rise in wave number. Stream functions of streamlines, velocities, and heat and mass transfer rates intensify for any amplitude of wavy baffles. Local Nusselt ameliorates effectively with amplification of Ra. Average entropy is lower and Bejan number attains higher values at low Ra while the opposite result is visualized at high Ra.