Numerical Simulation of Local Erosion of Spur Dike Groups in Sandy Riverbed Under Influence of Froude Number
In order to analyze the influence of Froude number on local erosion of spur dike groups in sandy riverbed,numerical simulation of local erosion of spur dike groups in sandy riverbed with different Froude numbers was carried out based on MIKE21,and the change rules of erosion range and characteristic section were summarized.The results show that the local erosion occurs in all the other spur dike heads except NoⅡdam head.Under the same Froude number,the smaller the sediment particle size is,the greater the erosion range and cross section changes are,and the higher the Froude number is more obvious;Under the same particle size,the greater the erosion range and cross section changes,and the smaller the sediment particle size is,it is more obvious;When the sediment particle size is small and the Froude number is large,the erosion range affects almost the whole channel of the spur dike groups,and the whole riverbed near the first dam is washed first and silted later.
Froude numbersandy riverbedspur dike grouplocal scouringnumerical simulation
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维普
