湖泊水库垂向二维水温分布预测

在湖泊水库大水体研究中引入K-ε模式,将水动力方程与水温方程耦合建模,合理考虑了水流运动与水温分布的相互影响。水温模型中对水面热交换及太阳辐射在水体中的透射等进行了细致处理。模型解法上,采用具有自动迎风效应的混合有限分析五点格式,通过红枫湖垂直剖面二维水温分布实例研究,结果表明,水流流场预测合理,枯丰水期水温分布预测效果良好。

Prediction of Vertical Two-dimensional Temperature Distribution in Lakes and Reservoirs

The vertical two-dimensional water temperature model is developed by coupling hydrodynamic equations with temperature equation and the K —ε model is applied to the research on large water body in lakes and reservoirs. The interactions between flow and temperature are reasonably considered. The heat transfer in the air-water interface and the penetrance of the sun in the water are detailedly expressed in the temperature equation. The advanced finite analytic numerical method with five grid points is used to solve the model equations. The model is also applied to the research on vertical two-dimensional flow and temperature of Hongfeng Lake in GuiZhou Province. The results indicate that the predicted velocity fields are reasonable and the predicted temperature distributions are very close to the measured ones.