采沙河流二维水沙耦合数学模型  

2D Coupling flow and sediment mathematical model for flows related to sand excavation

作　　者：赖永辉[1] 谈广鸣[1] 曾慧俊[1] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室

出　　处：《武汉大学学报（工学版）》2008年第1期9-12,共4页Engineering Journal of Wuhan University

基　　金：国家重大基础研究计划973项目(编号:2003CB415200);国家自然科学基金项目(编号:50679064)

摘　　要：对引进的采沙河流二维水沙数学控制方程组进行系列变形和化简,并利用逆风格式和ADI法及有限差分法对方程组进行离散求解,建立了采沙河流平面二维水沙耦合河流数学模型.与传统的河流数学模型相比,该模型中加入了反映采喂沙活动影响强度大小的参数采沙通量Fm与喂沙通量Ff,可反映出河流采喂沙活动对河床变形影响的持续性和同步性,可以精细地模拟和描述采沙河流中的水沙运动变化情况.On the basis of series of ratiocinations and simplification of a 2D coupling flow and sediment control equations which is appropriate to flows related to sand excavation ,the equations can be solved by using upwind scheme and finite difference method; thus a 2D coupling flow and sediment mathematical model is established. Comparing with traditional flow mathematical model, this one is special for its additional parameters, transportation of sand excavation Fm and transportation of barged-in-fill sand Ff, which reflect the influence intensity of sand excavation and sand filling. In this mode, the transformation of sand and flow can be narrated by simulating and reflecting the durative and synchronization of influence made by sand excavation and sand filling to the change of river bed subtly.

关 键 词：水沙 耦合 数学模型 

分 类 号：TV143[水利工程—水力学及河流动力学]