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| Received:November 25, 2014 Revised:February 28, 2015 |
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| DOI：10.7511/jslx201602016 |
| KeyWord:shallow water horseshoe vortex spur dike flows free surface flow FVM |
| Author | Institution |
| 李子龙 |
上海交通大学 船舶海洋与建筑工程学院, 上海 |
| 寇军 |
上海交通大学 船舶海洋与建筑工程学院, 上海 |
| 张景新 |
上海交通大学 船舶海洋与建筑工程学院, 上海 ;河口海岸交通行业重点实验室, 上海 ;上海交通大学 水动力学教育部重点实验室, 上海 |
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| Abstract: |
| Spur dike structures are widely used in hydraulic engineering,by constructing series of spur dikes perpendicular to the river banks the flow is kept away from the erodible banks,and as a result the laterally confined flow is accelerated to a sufficiently high velocity to keep the navigation channel at the proper depth.This paper is focused on with flows around a spur dike.We established a 3D model with free surface,which is based on unstructured meshes.The finite volume method (FVM) is employed to discretize the governing equations and one equation S-A turbulence model was used to simulate the turbulent flow.For study cases with different Fr number,we analyzed the flow structures near the non-submerged spur dike,discussed the formation of the vortex system at the base of the spur dike.Furtherly the length and width of the recirculation zone were calculated to reveal the evolution of the shear flow generated from the spur dike tip. |
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