6533b82cfe1ef96bd12900ea

RESEARCH PRODUCT

Experimental Analysis of Horizontal Turbulence of Flow over Flat and Deformed Beds

Donatella Termini

subject

MeteorologyTurbulenceK-epsilon turbulence modelFlow (psychology)Bed formBurst cycleMechanicsLaboratory experimentVortexOpen-channel flowQuadrant (plane geometry)Physics::Fluid DynamicsFlumeFlow turbulence structureTurbulence kinetic energyOpen-channel flowGeologyWater Science and TechnologyCivil and Structural Engineering

description

Abstract Laboratory experiments in a straight flume were carried out to examine the evolution of large-scale horizontal turbulent structures under flat-bed and deformed-bed conditions. In this paper, the horizontal turbulence of flow under these conditions is analyzed and compared. The conditioned quadrant method is applied to verify the occurrence of turbulent events. The distributions of horizontal Reynolds shear stress and turbulent kinetic energy are also presented and discussed. Results show the occurrence of an “initial” sequence of horizontal vortices whose average spatial length scales with the channel width. Under deformed-bed conditions, this spatial length does not change.

yearjournalcountryeditionlanguage
2015-12-01Archives of Hydro-Engineering and Environmental Mechanics
https://doi.org/10.1515/heem-2015-0021