利用二、三维嵌套技术数值模拟复杂边界下的流场

通过数值模拟复杂几何区域和边界条件下二、三维嵌套紊流模型，获得了计算区域内任意一点的流场信息。这一方法克服了常规的单纯模拟二维或三维紊流控制方程组而无法获得准确的自由表面和三维紊流场的缺点，通过两者有机的结合，并采用动边界处理等先进的计算技术，得出了精度更高、更为合理的紊流场。该方法曾被用于三峡工程大江截流完成之后导流明渠通航的流场模拟中，计算结果合理可信，部分成果的精度也已得到了实测资料的验证，成果为导流明渠通航路线的选择提供了依据

Simulation of Flow Field of Complicated Boundary by Using 2D-3D Combining Turbulent Model

A 2D 3D combining turbulent model of the complicated boundary is developed, in which some new techniques are used to handle the moving boundary. The important hydraulic parameters of flow field at any points in the calculating domain can be obtained by this model. The results given by this model are more reasonable than that by traditional models and it has better capacity of prediction. In the traditional models, some parameters such as pressure cannot be obtained in 2D simulation and exact free water surface is difficult to be obtained in 3D simulation, since 2D and 3D turbulent flow fields are simulated separately. The model has been used to simulate the flow field of the diversion open channel of THREE GORGE PROJECT. The numerical results are verified by the actual measurement and adopted by the construction authority in choosing the navigation route of the diversion open channel.