Numerical investigation of combined heat transfer through hollow brick walls Bouchaib Jamal, Mohammed Boukendil, Lahcen El moutaouakil, Abdelhalim Abdelbaki and Zaki Zrikem Eur. Phys. J. Plus, 135 10 (2020) 813 Published online: 12 October 2020 DOI: 10.1140/epjp/s13360-020-00840-8