Numerical Modeling of Natural Convection Heat Transfer in a Wavy Wall Enclosure Filled by a Cu-water Nanofluid with a Square Cooler

Abstract

A numerical analysis used to simulate natural convection heat transfer of nanofluid (Cu-water) in a wavy-wall enclosure has been performed. In the paper, the bottom wall of the enclosure has a sinusoidal wavy geometry. The vertical walls are maintained respectively at hot and cold temperatures while the top and bottom walls are thermally insulated. The present investigation considered the effects of pertinent parameters such as; wave amplitude (from 0 to 0.2) and undulations number (from 1 to 3) for different volume fraction of nanoparticles and Rayleigh numbers. The results show that the heat transfer rate inside the wavy enclosure increases by decreasing the wavy surface amplitude. Moreover, increasing undulations number leads to enhance the heat transfer rate. It is also found that by increasing the volume fraction of nanoparticles and Rayleigh number, the heat transfer rate increases.