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首页> 外文期刊>Journal of Hydroinformatics >Verification of CFD tool for simulation of cavitating flows in hydraulic systems
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Verification of CFD tool for simulation of cavitating flows in hydraulic systems

机译：验证用于液压系统中空化流模拟的CFD工具

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Cavitation is an undesirable phenomenon in hydraulic systems, as it causes erosion and noise. The main difficulty in cavitation prediction when using Fluent software is lack of an openly accessible tool for implementation of a freely chosen homogeneous cavitation model. In this paper the main challenge is to make such a tool, user defined function (UDF). The second challenge is to use a qualitative method in the assessment of the results of verification process. Three cavitation models are verified in Fluent 14.5: Singhal et al., Schnerr & Sauer and Zwart et al. The verification is based on the benchmark example from the Cavitation Modeling tutorial. Three methods of the algorithms verification are used: analysis of the convergence history of volume fraction, comparison of vapour volume fractions and statistical analysis of these data. The original achievements are not only the verified codes but also statistical analysis based on the computer methods of image analysis performed using two correlation coefficients: the first based on the cavitation intensity, and the second based on the changes of the cloud shape. The results of the analyses do not give any reasons to reject the UDFs. The appendix contains the analysed codes (available with the online version of this paper).
机译：空化是液压系统中不希望的现象，因为它会引起腐蚀和噪音。当使用Fluent软件进行气穴预测时，主要困难在于缺少可自由选择的均质气穴模型实现工具。在本文中，主要的挑战是制作这样的工具，即用户定义功能（UDF）。第二个挑战是在评估验证过程的结果时使用定性方法。 Fluent 14.5中验证了三种空化模型：Singhal等人，Schnerr＆Sauer和Zwart等人。验证基于“空化建模”教程中的基准示例。使用了三种算法验证方法：体积分数的收敛历史分析，蒸气体积分数的比较以及这些数据的统计分析。最初的成就不仅是经过验证的代码，而且是基于使用两个相关系数执行的图像分析计算机方法进行的统计分析：第一个基于空化强度，第二个基于云的形状变化。分析结果没有给出拒绝UDF的任何理由。附录包含已分析的代码（可通过本文的在线版本获得）。

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