ANALYTICAL METHODS FOR VELOCITY DISTRIBUTION AND DIP-PHENOMENON IN NARROW OPEN-CHANNEL FLOWS

Rafik Absi (1)

1 EBI - Inst. Polytech. St-Louis

In this study, we present analytical tools for velocity distribution in steady uniform open-channel flows. Simple dip-modified laws are presented. An ordinary differential equation based on an analysis of the Reynolds-averaged Navier-Stokes (RANS) equations is proposed. Comparisons of predicted velocity profiles with experimental data show good agreement. It is well known that dip-phenomenon depends on aspect ratio Ar (ratio of the channel width b to the water depth h). Results show that it should depend also on channel slope and friction velocity.

Domaines: Mécanique des fluides [physics.class-ph]; Mécanique des fluides [physics.class-ph]

Rafik Absi. ANALYTICAL METHODS FOR VELOCITY DISTRIBUTION AND DIP-PHENOMENON IN NARROW OPEN-CHANNEL FLOWS. IWEH. International Workshop on Environmental Hydraulics Theoretical, Experimental and Computational Solutions, Oct 2009, Valencia, Spain. pp.127-129. ⟨hal-00558593⟩