摘要
过去对复杂流动的三维数值模拟往往要采用许多简化处理方法,使得数值模型的适用性受到很大限制,所得结果也不能全面反应流场的特征.本文用有限容积法直接求解三维椭圆型流动控制方程,紊流模型采用有浮力修正的κ-ε模型.本文首先将该模型用于有横流情况下岸边等密度排放问题,以检验本数值模型和计算程序的正确性,所得结果正确预报了排放口下游的回流区,与文献[7]的计算和实验结果一致.然后进一步将其应用于有横流情况下的温排水、取水问题,所得结果合理,并精细地揭示了流场的内部特征.
The use of the mathematical models so far for three-dimensional flow has some limitations because of their simplifications. Many characteristics of the flow field can not be predicted by these models. In this paper the three-dimensional elliptic governing equations are solved by finite-volume methods; the buoyancy extensions of the widely tested k-e model is adapted. The method is first applied to calculate the field of side discharge into open channel flow. The results are in good agreement with those of ref. [7]. Then it is further used to the intake discharge problem which is of a typical layout in cooling-water projects, and the calculated results, which predict in detail the characteristics of flow field, are reasonable.
出处
《应用数学和力学》
EI
CSCD
北大核心
1992年第10期925-933,共9页
Applied Mathematics and Mechanics
基金
国家教委博士点基金资助课题
关键词
紊流
热污染
椭圆型
三维
数值模型
turbulence, thermal pollution, elliptic, three-dimensional numerical model
