Numerical Study on Entropy Generation in a Horizontal Channel with Fins Using Hybrid Nanofluid

This study involved performing a two-dimensional numerical analysis of forced convection in a horizontal channel, to cool fins mounted on heated channel walls, with the use of a laminar hybrid nanofluid. The finite volume approach, employing the SIMPLER algorithm, was used to solve the determining equations. The effect of fin height "hf", fin space "d" and nanoparticle volume fraction (4)) on the flow structure, entropy generation, and heat transfer enhancement are analyzed and discussed. The results were exposed in streamlines, isotherms, average Nusselt numbers, total and local entropy generation, thermal and friction, and the Bejan number. The results indicate that increasing the height of the fins leads to an improvement in heat transfer, but on the other hand, causes a notable elevation in entropy generation. The results further suggest that increasing the 'd' spacing (up to d=1.1) leads to a smooth and uniform passage of fluid between the fins, thereby reducing entropy generation. However, it also results in poor cooling of the fins.