NUMERICAL STUDY OF HEAT TRANSFER ENHANCEMENT BY INSERTING DIFFERENT SIZE BALLS INSIDE TUBE. Journal of Engineering and Sustainable Development, [S. l.], v. 25, n. 6, p. 1–11, 2021. DOI: 10.31272/jeasd.25.6.1. Disponível em: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/18.. Acesso em: 6 may. 2024.