基于间断有限元方法的二维悬沙数值模型的建立

A numerical model of 2D suspended sediment transport based on discontinuous Galerkin method

基于间断有限元法建立了具有二阶精度的非结构化网格二维悬沙数值模型。矩形浓度场理想算例模拟结果表明,模型具有捕捉浓度间断的能力。在此基础之上,进一步模拟了水槽中泥沙冲刷和输移过程,模拟结果表明,数值解与实测值吻合程度较好,模型可以较好描述二维悬沙运动。

A second-order accuracy, two-dimensional, unstructured grids numerical model for the suspended sediment transport is developed based on the discontinuous Galerkin method. The results of the ideal example of rectangular concentration show that the proposed model has the ability to capture the discontinuity of concen- tration. The model is further used to simulate the processes of sediment entrainment and transport on the sand bed in a flume. The comparison between the simulated results and laboratory measurements show good agree- ment. The model could be used to describe two-dimensional suspended sediment transport.