一种有限体积法三维港内粘性泥沙淤积模型研究

基于物理量守恒的有限体积法，建立了三维粘性泥沙运动及回淤数学模型。平面采用无结构三角形网格划分计算区域、拟合复杂海岸边界，垂向采用坐标变换技术，适应不平坦海底地形。以天津港港内泥沙回淤为例，模拟三维粘性泥沙的输运过程，得出了港内垂向分层潮流流场、垂向含沙量变化、淤积历程及淤积分布。结合实测地形资料对模型进行验证，为研究三维泥沙运动特性提供了一种新的方法。

3D Model Built with Finite Volume Method to Simulate Cohesive Sediment Accumulation in Harbor

Based on the law of physical quantity conservation,finite volume method is used to establish a 3D numerical model for simulating cohesive sediment movement and deposition. Structureless triangular grid is adopted to divide computation area and fitting complex coast border, coordinate transformation technology is adopted vertically to adapt to uneven seabed topography. The sediment deposition of Tianjin port is based on to build 3D cohesive sediment movement model,which leads to tidal flow field stratified vertically in harbor,variation of vertical sediment concentration,sediment deposition process and distribution.The measured geological data is used to verify the above model,which will provide a new method to study the characteristics of sediment movement.