开挖过程中悬浮泥沙扩散输移的数值模拟

摘要

通过建立平面二维潮流和悬浮泥沙输移扩散的数学模型,模拟某挖泥工程中悬浮泥沙的扩散输移过程,并应用非结构网格的有限单元法进行离散求解.该模型结合工程实际,采用连续线源模拟挖泥过程中的增量悬沙,以揭示其在开挖过程中扩散输移的机理,为工程环境影响评价提供科学依据.%Through the mathematic model of planar 2D tide and suspended sediment diffusion and movement,the process of suspended sedimenz diffusion and movement in some excavation project is simulated. Finiteelement method with non-structural mesh is applied for discrete solution. By combining with actual project, the continuous line source is adopted in the model to simulate the increment suspended sediment during excavation.The mechanism of suspended sediment diffusion and movement is summarized, which will provide scientific evidence for the environmental effect evaluation.