Author(s): Terunori Ohmoto; Hiroyuki Sugimoto; Norimitsu Nariai
Linked Author(s): Terunori Ohmoto
Keywords: Delta vanes; Longitudinal vortex; Sand ribbons; Sediments
Abstract: The streamwise development of longitudinal vortices and their effects on the sediments were investigated experimentally for different vortex pair configurations. Three-components velocity measurements have been made in an open channel flow with a vortex pair artificially generated by two delta vanes protruding from the flat bed. The experimental results showed that delta vanes produced sand ribbons and controlled the longitudinal vortices, the mean motion of the vortex centers qualitatively followed a vortex filament model and the vortices with the flow depth spacing indicated a significant interaction between them.
Year: 2001