水库温度分层流动的三维数值模拟

水库中水温是一个重要的水质因素,其变化直接影响水环境中水生生物的生存。为了预测水库水温分层分布规律,研究水流流动特性,采用剪切应力输运紊流数学模型,考虑紊动剪切应力的输运作用,数值模拟了水库中冷热水密度差产生浮力流继而导致温度分层。通过模拟结果与实测资料以及沿横向平均的二维水温模型计算结果的对比分析,结果表明剪切应力输运模型能够准确地模拟水库中温度分层流动,同时可给出密度下潜流流动细节情况。

Numerical Simulation of 3-D Thermally Stratified Flow in Reservoirs

Water temperature in reservoirs is a very important water quality factor which effects the living of aquatic biology system.In order to predict the thermally stratified law and the flow characteristic,a new three-dimensional turbulence model,named shear stress transport turbulence model,was described in detail.Comparisons between field data and the computed data of the laterally averaged hydrodynamics model were presented.It shows the mathematical model can be used to predict the features of the thermally stratified flow in reservoirs,and can give more details of the submergence flow of different density.