Investigation of vorticity and secondary flow strength near the protected bridge pier in a sharp bend
One notable feature of the flow dynamics along bend-shaped pathways is the presence of secondary flows, which introduce a degree of complexity to the flow behavior in this region. This study aimed to investigate the flow characteristics within a bend-shaped channel that features a central angle of 180º, incorporating an oblong pier with a collar. To collect velocity data within an equilibrium bed, a three-dimensional Vectrino velocimeter was employed. The findings indicated t
Researchers have investigated the complex flow dynamics around a bridge pier situated in a sharp, 180-degree bend. Using advanced velocimetry, they analyzed how secondary flows and vorticity are affected by the pier's design, specifically its collar thickness. The study found that peak tangential velocity occurs near the outer bank at the water's surface, indicating increased pressure. Vorticity was strongest counterclockwise at one section, while the peak secondary flow strength varied with collar thickness. Increasing the collar's thickness significantly reduced the strength of secondary circulation, suggesting a method to lessen flow-induced risks.
Understanding these flow patterns is crucial for designing more resilient bridge piers and mitigating potential erosion or structural damage in river bends.
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