深水湖泊水库水温数值计算模型研究  

Study on water temperature simulation model for deep lake and reservoir

作　　者：任华堂[1] 陈永灿[1] 刘昭伟[1] 申满斌[1] 朱德军[1] 

机构地区：[1]清华大学水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《水力发电学报》2007年第3期99-104,共6页Journal of Hydroelectric Engineering

基　　金：国家重点基础研究计划(973)(NO.2006CB403304);高等学校优秀青年教师教学科研奖励计划资助项目

摘　　要：本文针对深水湖泊水库三维温度场计算量较大的特点提出了一种计算快捷的湖泊水库三维温度计算模型。该模型根据控制方程中各物理过程的变化特点采用算子分裂法求解,快过程采用隐式求解,慢过程采用显式求解,协调了不同物理过程模拟的时间步长;文中对σ坐标系下的斜压梯度力和水平扩散项的表达式采用z平面均值扣除法进行处理,提高了二者的计算精度,更加适合于湖泊水库的应用。文章最后采用两个算例对模型进行了验证,表明了模型的有效性和实用性。A simple and convenient 3-D temperature simulation model is developed to deal with the large amount of CPU time in this paper. The control equations are solved with the arithmetic operator splitting technique according to the characteristic of each physical process. That is, the implicit scheme is used in fast physical processes while the explicit scheme is used in slow physical processes. The baroclinic pressure gradient expression and horizontal diffusion expression in sigma coordinate are treated by the removal of z-plane mean value. At last, the model is applied in two examples cases, which show the model is reliable and efficient.

关 键 词：环境水力学 水温数值计算模型 算子分裂 DSI法 z平面均值扣除法 

分 类 号：TV131[水利工程—水力学及河流动力学]