Comparative Analysis of Friction Coefficient Evolution in Hydroelectric Dam Penstocks: Theoretical vs. Numerical Methods. Global Journals of Research in Engineering, [S. l.], v. 24, n. A2, p. 13–21, 2024. DOI: 10.34257/GJREAVOL24IS2PG13. Disponível em: https://engineeringresearch.org/index.php/GJRE/article/view/101689. Acesso em: 4 jun. 2026.