Transition from laminar to chaotic natural convection of air saturating a porous square enclosure Saad Adjal, Sabiha Aklouche-Benouaguef and Belkacem Zeghmati Eur. Phys. J. Appl. Phys., 97 (2022) 40 Published online: 01 July 2022 DOI: 10.1051/epjap/2022220006