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首页> 外文会议>Congress of Asia and Pacific Division of International Association of Hydraulic Engineering and Research >THE VOF METHOD BASED ON REFINED GRIDS PARTITION OF PARTIAL DOMAIN
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THE VOF METHOD BASED ON REFINED GRIDS PARTITION OF PARTIAL DOMAIN

机译：基于部分域的精细网格分区的VOF方法

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摘要

Free surface flow can treated by the volume of fluid (VOF) method, but computational results based on coarse grid partitions of the total computational domain (CGPTCD) are unable to describe accurate positions of free surface and the detailed distribution of hydraulic factors adjacent to it, and computational results based on refined grid partitions of the total computational domain(RGPTCD)are very expensive. In this paper, the VOF method based on refined grid partitions of partial domains (RGPPD) is proposed to solve the above problems. First, the total computational domain(TCD) is partitioned by coarse grids, and a coupled mathematical model between k-ε model and VOF method is applied to obtain the distribution of volume fraction function. Secondly, the domain where volume fraction function lies between zero and one, is refined, the updated velocity and volume fraction function are calculated based on the RGPPD, and then the accurate position of free surface can be obtained through analysing the distribution of updated volume fraction function. The above method is applied in a 2-D free overflow dam case, whose computational results agree well with test data, showing it is valid, reliable and economical to treat free surface flow with VOF method based on RGPPD.
机译：通过流体（VOF）方法的体积可以处理自由表面流量，但基于总计算结构域（CGPTCD）的粗网分区的计算结果无法描述自由表面的准确位置和与其相邻的液压因子的详细分布并且基于总计算域（RGPTCD）的精细网格分区的计算结果非常昂贵。本文提出了基于部分域（RGPPD）的基于精细网格分区的VOF方法来解决上述问题。首先，通过粗网格划分总计算域（TCD），并且应用K-ε模型和VOF方法之间的耦合数学模型来获得体积分数函数的分布。其次，将体积分数函数位于零和一个之间的域，基于RGPPD计算更新的速度和体积分数功能，然后通过分析更新的体积分数的分布可以获得自由表面的精确位置功能。上述方法应用于2-D自由溢流坝壳，其计算结果与测试数据相加，表明它是有效的，可靠且经济的，以根据RGPD与VOF方法处理自由表面流量。

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