水深平均k—ε紊流模型在大尺度水域中的应用研究

本文利用Patanker求解紊动输运方程标准的SIMPLEC计算程式,对小尺度丁坝绕流进行了模拟计算,取得了与水槽试验一致的流速分布结果。为了探讨大尺度水域紊动量K、ε壁面边界条件的给定,本文将水槽看成是一种比尺模型,将水槽试验流速分布按重力相似和阻力相似准则延伸到大尺度水域,并以此研究k—ε模型模拟大尺度回流的置信水平。计算结果表明通过选择合适的紊动量壁面边界条件,该模型对大尺度回流计算也能取得较好的结果。

Applied Research on Solving Large Scale Recirculation with Depth-Average k-ε Turblent Model

In this paper,the flow field around spur-dike in flume is simulated by means of the SIM-PLEC procedure solving the equations of turbulent transport, the result of velocity distribution shows an agreement between calculating and measuring. In order to investigate the boundary condition of k and ε, the flume experiment is regarded as a model test, the velocity distribution in flume is infered to a large scale area according to the resembalence law of gravity and re-sistence. Caluclated results show that the k-ε model can be used to solve the larg scale recir-culation by giving proper boundary condition of k and ε.