2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/84980It is common to relate the dynamic contact angle $θ_d$ to the relative speed between the substrate and the contact line; theory suggests $θ_d^3 \propto U$. In fact, available physical models show that the dynamic angle involves speed logarithmically and in a model dependent manner. Experimental data consistent with this interpretation is cited.Fluid Dynamicstext