Experimental Observation Of Turbulent Structures In A Straight Flume

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Abstract

Experimental and theoretical studies of the structure of turbulence in open-channel flows have shown that the dynamics of the wall layer turbulence is dominated by the formation and growth of turbulent structures which evolve periodically as part of the so-called bursting phenomena. In the present paper experimental results obtained in a straight flume for different roughness conditions of the channel walls are described. The occurrence 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 the space-time correlations of the conditioned data.
Lingua originaleEnglish
Stato di pubblicazionePublished - 2010

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Straight
Turbulence
Open Channel Flow
Open channel flow
Bursting
Quadrant
Roughness
Surface roughness
Space-time
Experimental Results
Observation

All Science Journal Classification (ASJC) codes

  • Software
  • Modelling and Simulation
  • Environmental Engineering

Cita questo

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title = "Experimental Observation Of Turbulent Structures In A Straight Flume",
abstract = "Experimental and theoretical studies of the structure of turbulence in open-channel flows have shown that the dynamics of the wall layer turbulence is dominated by the formation and growth of turbulent structures which evolve periodically as part of the so-called bursting phenomena. In the present paper experimental results obtained in a straight flume for different roughness conditions of the channel walls are described. The occurrence 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 the space-time correlations of the conditioned data.",
keywords = "Open channel flow; sediment transport; bed-forms; flow turbulence structure; boundary roughness",
author = "Donatella Termini and Vincenzo Sammartano",
year = "2010",
language = "English",

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TY - CONF

T1 - Experimental Observation Of Turbulent Structures In A Straight Flume

AU - Termini, Donatella

AU - Sammartano, Vincenzo

PY - 2010

Y1 - 2010

N2 - Experimental and theoretical studies of the structure of turbulence in open-channel flows have shown that the dynamics of the wall layer turbulence is dominated by the formation and growth of turbulent structures which evolve periodically as part of the so-called bursting phenomena. In the present paper experimental results obtained in a straight flume for different roughness conditions of the channel walls are described. The occurrence 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 the space-time correlations of the conditioned data.

AB - Experimental and theoretical studies of the structure of turbulence in open-channel flows have shown that the dynamics of the wall layer turbulence is dominated by the formation and growth of turbulent structures which evolve periodically as part of the so-called bursting phenomena. In the present paper experimental results obtained in a straight flume for different roughness conditions of the channel walls are described. The occurrence 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 the space-time correlations of the conditioned data.

KW - Open channel flow; sediment transport; bed-forms; flow turbulence structure; boundary roughness

UR - http://hdl.handle.net/10447/239067

M3 - Paper

ER -