iarjetIARJETIARJET2708-5163https://doi.org/10.47310/iarjet.2022.v03i02.006Three-dimensional Analysis of a Cubic Enclosure Subjected to Radiation and Natural Convection for Various FluidsSalehEtaigMechanical Engineering Department, University of Benghazi, Benghazi, LibyaThe present work explores the thermal radiation with natural convection in a cubic enclosure filled with three different fluids. The domain was studied using a three-dimensional analysis where governing equations were solved employing a finite volume approach. The enclosure was studied using air, water and ethylene glycol to ascertain the thermal performance of each fluid. The velocity variation, temperature distribution and wall radiative heat flux are all studied and the results are presented in the current work and discussed thoroughly. The contours of temperature and velocity vector are also illustrated and discussed.