Author(s): Jahra Fatima; Hiroyuki Yamamoto; Ryota Tsubaki; Yoshihisa Kawahara
Linked Author(s): Yoshihisa Kawahara, Ryota Tsubaki
Keywords: Vegetated open channel; Mean velocity distribution; Momentumexchange; Straight channel; Meandering channel
Abstract: This study aims at revealing experimentally the mean flow characteristics in a straight channel and a meandering channel, both of which are partially covered by emergent and submerged rigid model vegetation. The special emphasis is placed on the development of mean velocity and momentum exchange process between the flow and the vegetation elements. Velocity measurement is carried out by electromagnetic velocimetry not only in fully developed regions but also in developing regions. The measured mean velocity distribution in fully developed region is found to show good agreement with those of previous studies for straight channel flows. Flow visualization is concurrently performed to measure the evolution process of large scale eddies at the interface region in both cases.
Year: 2009