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首页> 外文期刊>Engineering Applications of Computational Fluid Mechanics >Experimental and Numerical Study on Velocity Fields and Water Surface Profile in a Strongly-Curved 90° Open Channel Bend
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Experimental and Numerical Study on Velocity Fields and Water Surface Profile in a Strongly-Curved 90° Open Channel Bend

机译：强弯90°明渠弯道速度场和水面轮廓的实验与数值研究

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AbstractThe flow pattern changes at open channel bend as the result of the presence of centrifugal force. Parameters such as water surface level, the transverse and depth velocity distribution, secondary flow and separation zones deeply depend on bend angel and radius, while many researchers are interested in flow patterns at bends. This paper presents an experimental and numerical study of the flow patterns in a strongly-curved 90° open channel bend. The numerical modelling was carried out using the finite volume method. In this numerical study, the k – ε (RNG) model was used to predict the turbulence, and the volume of fluid (VOF) method was used to simulate the water free surface. The numerical results were verified against data from a program of experiments conducted in this study. A comparison between the experimental data and the results of the numerical model showed that the k – ε (RNG) and VOF methods are capable of simulating the flow pattern in the strongly-curved bends. The results showed that ...
机译：摘要由于存在离心力，流道在明渠弯道处发生变化。诸如水面水位，横向和深度速度分布，二次水流和分离带等参数在很大程度上取决于弯曲角度和半径，而许多研究人员对弯曲处的水流模式感兴趣。本文介绍了在强弯曲的90°明渠弯道中流动模式的实验和数值研究。数值模拟是使用有限体积法进行的。在此数值研究中，使用k –ε（RNG）模型来预测湍流，并使用流体体积（VOF）方法来模拟无水表面。根据本研究中进行的实验程序中的数据验证了数值结果。实验数据和数值模型结果的比较表明，k –ε（RNG）和VOF方法能够模拟强弯弯头的流动模式。结果表明...

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