长江口自适应网格的构造与水流和泥沙冲淤的数值模拟的初步研究

随着沿海经济带的开发利用,河口海岸动力学问题,如航道淤积、河口演变、港湾建设及污染物的排放和扩散等,日益引起人们的重视.数值模拟方法是研究这些海岸环境问题的理想工具之一,但由于河口区域的海岸线和河岸线的形状非常复杂,加上众多的岛屿,给模式网格的划分造成很大的困难.为此,我们将自适应网格的生成方法应用于河口港湾的数值模拟研究,以长江口和杭州湾的水动力学模拟为例,该法较好地克服了均匀网格拟合边界的困难,得到了较合理的计算结果.

Numerical generation of adaptive mesh and preliminary research of numerical simulation of current and silt sedimentation in the Changjiang Estuary

Along withb the development of coastal economic bank, the problems of hydrodynamics in estuary area, such as the silting upof waterway, evolution of estuary area, the construction of harbour and the pollution problems, are being brought to one's attention. Numerical simulation method is one of the ided tools to study such problem. But owing to the complicated shapes of the coastal lines of estuary areaand with many islands in the region, it is very difficult to make the discretion of the region of the model. For this reason, the generationmethod of adaptive mesh is applied to the numerical research of estuary and harbour regions, e. g., the simulation of hydrodynamic for theChangjiang Estuary and the Hangzhou Bay, which overcomes, the difficulties of boundary fitting when using regular mesh, and gives raason able results.