一种新的高精度的溃坝水流数值模型  

A New and Highly Accurate Numerical Model of Dam-bursting Flow

作　　者：邓家泉[1] 曾越[2] 吴卫民[2] 

机构地区：[1]水利部珠江水利委员会科学研究所,广东广州510611 [2]武汉大学水电学院,湖北武汉430072

出　　处：《人民珠江》2005年第2期24-27,共4页Pearl River

基　　金：水利部科技创新项目 (scx2 0 0 0 -4 6)

摘　　要：溃坝问题,严格来讲,是一种不连续洪水波问题。传统的水流数值模型都是建立在数值求解圣维南方程组基础上的,而该方程组的基本假定就是水流必须具有连续性,所以,以圣维南方程为基本控制方程的水流数值模型应用于溃坝问题的计算是非常牵强的。提出一种新的以描述分子运动的BGK波尔兹曼方程为基础的水流数值模拟方法,这种方法没有水流连续性假定,计算表明,这种数值模型能够精确。Dam-bursting, strictly speaking, is a problem of non-continuous flood wave. Traditional numerical models of flow are established in general on the basis of Saint-Venant equations for numerical soloution, the basic assumption of which is that the flow must be of continuity. Hence, it is extremely farfetched to apply the flow numerical model which is based on Saint-Venant equations to calculating the dam-bursting problem. The authors present a new method of flow numerical simulation based on BGK Bolzmann equation for describing molecular motion, in which there is no assumption that the flow should be continuous. Calculations show that this numerical model can accurately and steadily simulate the problem of dam-bursting wave.

关 键 词：溃坝 BGK波尔兹曼方程 BGK数值模型 明渠水流 

分 类 号：TV139.231[水利工程—水力学及河流动力学]