Source: https://www.researchgate.net/profile/Khaoula-Rehhali/publication/322002689_MRT-scheme_applied_to_combined_natural_convection_and_thermal_radiation_in_a_cavity_partially_heated_from_one_vertical_side_and_cooled_from_above/links/5d4d4b60299bf1995b710e9f/MRT-scheme-applied-to-combined-natural-convection-and-thermal-radiation-in-a-cavity-partially-heated-from-one-vertical-side-and-cooled-from-above.pdf