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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。
In this paper, Patanker is used to solve the standard SIMPLEC calculation program of turbulent transport equations. The flow around small-scale gib bars is simulated and the results of velocity distribution consistent with the experiments of sinks are obtained. In order to discuss the boundary conditions of wall boundary K and ε in large-scale watershed, we consider the sink as a scale model, and extend the test flow distribution of the sink to the large-scale watershed according to the gravity similarity and resistance similarity criterion Study the k-ε model to simulate the confidence level of large-scale backflow. The calculation results show that the model can achieve good results for large-scale backflow calculation by selecting the appropriate boundary conditions of turbulent boundary conditions.