Presenter/Author Information

Donatella Termini
Vincenzo Sammartano

Keywords

open channel flow, sediment transport, bed-forms, flow turbulence structure, boundary roughness

Start Date

1-7-2010 12:00 AM

Description

Experimental and theoretical studies of the structure of turbulence in openchannelflows have shown that the dynamics of the wall layer turbulence is dominated bythe formation and growth of turbulent structures which evolve periodically as part of theso-called bursting phenomena. In the present paper experimental results obtained in astraight flume for different roughness conditions of the channel walls are described. Theoccurrence of turbulent events is verified by applying the conditioned quadrant analysis.The information about the spatial and temporal scales of the events is obtained through thespace-time correlations of the conditioned data.

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Jul 1st, 12:00 AM

Experimental Observation Of Turbulent Structures In A Straight Flume

Experimental and theoretical studies of the structure of turbulence in openchannelflows have shown that the dynamics of the wall layer turbulence is dominated bythe formation and growth of turbulent structures which evolve periodically as part of theso-called bursting phenomena. In the present paper experimental results obtained in astraight flume for different roughness conditions of the channel walls are described. Theoccurrence of turbulent events is verified by applying the conditioned quadrant analysis.The information about the spatial and temporal scales of the events is obtained through thespace-time correlations of the conditioned data.