Skip to main content
Passa alla visualizzazione normale.

DONATELLA TERMINI

Experimental analysis of horizontal turbulence of flow over flat and deformed beds

  • Authors: Termini, D.
  • Publication year: 2015
  • Type: Articolo in rivista (Articolo in rivista)
  • Key words: Bed forms; Burst cycle; Flow turbulence structure; Laboratory experiments; Open-channel flow;
  • OA Link: http://hdl.handle.net/10447/207901

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.