Tchawe Tchawe Moukam; Nkontchou Ngongang Francois; Tientcheu Nsiewe Max-Well; Djiako Thomas; Djeumako Bonaventure; Tcheukam-Toko Denis. Comparative Analysis of Friction Coefficient Evolution in Hydroelectric Dam Penstocks: Theoretical Vs. Numerical Methods. GJRE 2024, 24, 13-21.