TY - GEN
T1 - Bend scour reduction induced by an air-bubble screen under live-bed conditions
AU - Dugué, V.
AU - Schleiss, A. J.
AU - Blanckaert, K.
PY - 2012
Y1 - 2012
N2 - Open-channel bends are characterized by complex interactions between streamwise flow, curvature-induced secondary flow and bed morphology. These bend effects cause erosion near the outer bank, and deposition near the inner bank. Previous laboratory experiments in a sharply curved flume with a mobile bed under clear-water scour conditions have shown that an air-bubble screen generated with a porous tube on the bed can counteract the curvature-induced secondary flow and lead to a shift of the maximum scour away from the outer bank. The here reported study provides experimental results on the optimization of the bubble screen under live-bed conditions. The air-bubble screen considerably reduces erosion near the outer bank for all investigated configurations of the bubble screen. Comparison of three different locations of the porous tube shows that the bubble screen is most efficient when placed very near to the outer bank.
AB - Open-channel bends are characterized by complex interactions between streamwise flow, curvature-induced secondary flow and bed morphology. These bend effects cause erosion near the outer bank, and deposition near the inner bank. Previous laboratory experiments in a sharply curved flume with a mobile bed under clear-water scour conditions have shown that an air-bubble screen generated with a porous tube on the bed can counteract the curvature-induced secondary flow and lead to a shift of the maximum scour away from the outer bank. The here reported study provides experimental results on the optimization of the bubble screen under live-bed conditions. The air-bubble screen considerably reduces erosion near the outer bank for all investigated configurations of the bubble screen. Comparison of three different locations of the porous tube shows that the bubble screen is most efficient when placed very near to the outer bank.
UR - https://www.scopus.com/pages/publications/84867937426
M3 - Conference Paper published in a book
AN - SCOPUS:84867937426
SN - 9781466575516
T3 - River Flow 2012 - Proceedings of the International Conference on Fluvial Hydraulics
SP - 609
EP - 615
BT - River Flow 2012 - Proceedings of the International Conference on Fluvial Hydraulics
T2 - International Conference on Fluvial Hydraulics, River Flow 2012
Y2 - 5 September 2012 through 7 September 2012
ER -