天然河道湍浮力流动的数值模拟 Ⅰ:用隔离法实现三维复杂边界处理

Numerical simulation of turbulent buoyant flow in natural open channel Part Ⅰ:Segregated Method for 3 D complicated boundary treatment

作者编制了湍浮力流动的三维数学模型计算软件３ＴＢＦ．该计算软件用浮力修正的ｋε双方程湍流模型封闭雷诺时均方程组，结合ＳＩＭＰＬＥ算法，首次将隔离法应用于三维复杂边界条件的处理上，使其不但能模拟由冷热水密度差产生的浮力分层流动现象，同时也可以应用于天然河道的流动、传热问题中．本文是作者研究成果的第一部分。

A generalized software 3TBF has been developed for the numerical simulation of 3 D buoyant flows.A buoyancy modified k ε turbulent model is adopted to close the Reynolds equations and the Segregated Method is applied for the first time to treat 3 D complicated boundary in accordance with SIMPLE algorithm.The model has the ability not only to reflect the buoyancy effect induced by density difference between cooled water and natural water,but also to simulate the thermo hydraulic behavior of natural open channel flows.This paper is the first part of the study.It describes some skills of Segregated Method in 3 D complicated boundary treatment.