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本文针对河道弯曲、狭长的特点,引进贴体坐标.将复杂的河道计算域转换成规则矩形域,使问题在规则域上求解.拟合坐标系下模型改进表现在以下两方面,一是引进紊动动能和紊动耗散率闭合雷诺方程,使模型能够回答整治工程局部水流结构,如回流现象,二是建立了一种新的悬沙输移模式,该泥沙模型能体现悬沙与床沙交换机理,既适用于水库上游淤积计算,也适用于水库下游冲刷计算.
In this paper, the body curve is introduced according to the characteristics of curved and narrow river channel, which transforms the computational domain of complex river into a regular rectangular domain and solves the problem in the rule domain.The improvement of the model under the fitted coordinate system is manifested in the following two aspects: Turbulent kinetic energy and turbulence dissipation rate closed the Reynolds equation, so that the model can answer the remediation project local water flow structure, such as the return flow phenomenon. Second, a new model of suspended sediment transport was established. The sediment model can reflect the suspended sediment and Bed sand exchange mechanism, not only applies to the upper reservoir sedimentation calculation, also applies to the reservoir erosion calculation.