首页|A study of the effect of local scour on the flow field near the spur dike
A study of the effect of local scour on the flow field near the spur dike
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The flow field near a spur dike such as down flow and horseshoe vortex system(HVS)are susceptible to the topographic changes in the local scouring process,resulting in variation of the sediment transport with time.In this study,large eddy simulations with fixed-bed at different scouring stages were conducted to investigate the changes in flow field.The results imply that the bed deformation leads to an increase in flow rate per unit area,which represent the capability of sediment transportation by water,in the scour hole.Moreover,the intensity of turbulent kinetic energy and bimodal motion near the sand bed induced by the HVS were also varied.However,the peak moments between the two sediment transport mechanisms were different.Hence,understanding the complex feedback mechanism between topography and flow field is essential for the local scour problem.
Spur dikeLocal scourLarge eddy simulationDown flowHorseshoe vortex system
Yu-Tian Li、Jie-Min Zhan、Wing-Hong Onyx Wai
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Department of Industrial Design,School of Industrial Design and Ceramic Art,Foshan University,Foshan 528000,China
Department of Applied Mechanics and Engineering,Shenzhen Campus of Sun Yat-sen University,Shenzhen 518107,China
Department of Civil and Environmental Engineering,The Hong Kong Polytechnic University,Hong Kong 999077,China
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