A numerical analysis is performed to investigate the laminar, free convection flow in\nan Open Enclosure Using Lattice Boltzmann Method (LBM) in the presence of Carbon\nnanotube and Cu nanoparticles. The problem is studied for different volume\nfractions of nanoparticles, and aspect ratio of the cavity for various Ray ligh numbers.\nThe volume fraction of added nanoparticles to water (as base fluid) is lower than 1%\nto make dilute suspensions. The study presents a numerical treatment based on LBM\nto model convection heat transfer of Carbon nanotube based nanofluids. Results\nshow that adding a low value of Carbon nanotube to the base fluid led to significant\nenhancement of convection rate. Results show that adding nanoparticles to the base\nfluid enhances the rate of natural convection in a cavity. Make a comparison between\nCarbon nanotube and Cu-nanoparticles shows that the Carbon nanotube-nanoparticle\nhas better performance to enhance convection rate at comparison with Cunanoparticles.
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