Search results for " meander wave"
showing 3 items of 3 documents
Bank Erosion and Secondary Circulation in a Meandering Laboratory Flume
2014
Abstract This paper reports peculiar results of experimental investigation on the secondary circulation motion of flow along a meander wave. Experiments were conducted in a large amplitude meandering laboratory channel for two values of the width-to-depth ratio. Here attention is focalized on how secondary motion affects the bank shear stress distribution, influencing the stability of the outer bank. The analysis essentially highlights that, especially for small width-to-depth ratio, as the channel curvature increases, besides the classical central-region secondary circulation cell a counter-rotating circulation cell forms in the outer-bank region. Such counter-rotating circulation cell all…
Role of secondary circulation on bank erosion in a large amplitude meandering laboratory channel
2009
This paper reports peculiar results of experimental investigation on the evolution of flow secondary circulation motion along a meander wave. The experiments have been conducted in a large amplitude meandering laboratory channel for two values of the width-to-depth ratio. Attention is focalised on how secondary motion affects the bank shear stress distribution, influencing the bank stability. The analysis essentially highlights that, especially for small width-to-depth ratio, as the channel curvature increases besides the classical central-region secondary circulation cell a counter-rotating circulation cell forms in the outer-bank region. Such counterrotating circulation cell allows to obt…
Experimental investigation of the evolution of secondary motion in a large amplitude meandering flume
2008
The development of secondary motion along open-channel bends strongly affects the bed deformation and the channel plane evolution. Recent experimental results obtained at the apex section of a large amplitude meandering flume have confirmed that besides the main central circulation cell a second counter-rotating cell develops near the free surface of the outer bank. In the light of such results, in this work the attention is devoted to the analysis of the evolution of the observed secondary motion along whole bend. The analysis is conducted on the basis of flow velocity data collected in five transversal sections along half wave-length of the same large amplitude meandering flume.