Search results for " Turbulence intensity"

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Analysing longitudinal turbulence intensity in vegetated channels

2007

Vegetation altering hydrodynamic conditions of an open channel flow controls the exchanges of sediment, nutrients and contaminants. In this paper the turbulence structure of open-channel flow over a flexible grass vegetation is investigated. Velocity measurements were carried out, in a rectangular flume, using a 2D-ADV (Acoustic Doppler Velocimeter) for different values of stem concentration, water discharge, and bed slope. The experimental results showed that: 1) the maximum value of the longitudinal turbulence intensity occurs at a water depth close to the bent vegetation height; 2) the turbulence intensity damps for increasing values of the stem concentration; 3) above the vegetation hei…

TurbulenceMechanical EngineeringMaximum flow problemFlow (psychology)lcsh:SBioengineeringAtmospheric scienceslcsh:S1-972Industrial and Manufacturing EngineeringOpen-channel flowopen-channel turbulence vegetationlcsh:AgriculturePhysics::Fluid DynamicsFlumeVegetated channels Flexible vegetation Acoustic Doppler Velocimeter Turbulence intensity Relative turbulence intensity.Turbulence kinetic energymedicineEnvironmental scienceAcoustic Doppler velocimetrylcsh:Agriculture (General)medicine.symptomVegetation (pathology)

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