点击次数：

论文类型：期刊论文

发表时间：2017-03-01

发表刊物：CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY

收录刊物：SCIE、Scopus

卷号：35

期号：2

页面范围：444-451

ISSN号：0254-4059

关键字：sediment transport; 2D vertical model; Youngs-VOF; Euler-WENO; bed evolution

摘要：A 2D vertical (2DV) numerical model, without sigma-coordinate transformation in the vertical direction, is developed for the simulation of flow and sediment transport in open channels. In the model, time-averaged Reynolds equations are closed by the k-epsilon nonlinear turbulence model. The modified Youngs-VOF method is introduced to capture free surface dynamics, and the free surface slope is simulated using the ELVIRA method. Based on the power-law scheme, the k-epsilon model and the suspended-load transport model are solved numerically with an implicit scheme applied in the vertical plane and an explicit scheme applied in the horizontal plane. Bedload transport is modeled using the Euler-WENO scheme, and the grid-closing skill is adopted to deal with the moving channel bed boundary. Verification of the model using laboratory data shows that the model is able to adequately simulate flow and sediment transport in open channels, and is a good starting point for the study of sediment transport dynamics in strong nonlinear flow scenarios.