ABSTRACT
Hydraulic model investigations using model families were conducted on stepped spillway flow to study the influence of model scale on the aeration process. Limiting values of the Reynolds and Weber numbers are proposed in order that effects of viscosity and surface tension on air concentration and mixture flow velocity become negligibly small compared to inertial forces. The results indicate a critical minimum scaling factor of about 10 to 15 with reference to a standard prototype step height of 0.6 m.
