In the present study. mathematical modeling was performed to simulate natural convection of a nanofluid in a square enclosure using the thermal lattice Boltzmann flux solver (TLBFS). Firstly. natural convection in a square enclosure. https://www.bekindtopets.com/hot-mega-Sweetlix-16-8-Meat-Maker-with-Rumensin-18-lb-limited-choice/