Cross sectional flow in a meandering laboratory channel with vegetated bed

Donatella Termini, Donatella Termini

Risultato della ricerca: Otherpeer review

Abstract

As it is known, the outer-bank of a meander wave is considerably vulnerable to the erosion processes. Literature indicates that cross-stream circulation strongly affects the redistribution of the downstream velocity and boundary shear stress in curved channels. In steep outside bends, beside a central-region circulation cell, a counter-rotating circulation cell often forms in the upper part of the outer-bank region. Accurate understanding of the role of these circulation cells on velocity redistribution in bends is important to define protective measures of the outer-bank. Literature also shows that vegetation could modify flow velocity and turbulent structure. This work reports preliminary results of experimental work conducted in a large meander-ing channel with vegetation on the bed. The effect due the presence of vegetation on cross-stream flow and turbulence structure is examined by means of peculiar maps determined at the apex section in no-vegetated-bed and vegetated-bed conditions.
Lingua originaleEnglish
Pagine2269-2275
Numero di pagine7
Stato di pubblicazionePublished - 2016

All Science Journal Classification (ASJC) codes

  • Fluid Flow and Transfer Processes
  • Geotechnical Engineering and Engineering Geology

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