Numerical investigation of closures for interface forces acting on single air-bubbles in water using volume and fluid and front tracking models
Numerical investigation of closures for interface forces acting on single air-bubbles in water using volume and fluid and front tracking models
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DOI：
10.1016/j.ces.2005.03.048
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发表时间：
2005-11
影响因子：
4.7
通讯作者：
W. Dijkhuizen;Van Hengel;Ng Niels Deen;V. S. Annaland;J. Kuipers
中科院分区：
文献类型：
--
作者：
W. Dijkhuizen;Van Hengel;Ng Niels Deen;V. S. Annaland;J. Kuipers
利用直接数值模拟技术，对初始静止纯水中上升的单个气泡所受的阻力和虚拟质量力的闭合进行了数值研究。采用了三维正面跟踪模型，并将计算结果与二维流体体积模型的模拟结果进行了比较，以评估三维的影响。在模拟中，物理属性采用真实值，即密度比为800。计算得到的当量直径为1~10 mm的单个气泡在纯水中上升时的平均末端上升速度和平均长径比与已有的实验数据吻合较好。
Closures for the drag and virtual mass forces acting on a single air bubble rising in initially quiescent pure water have been numerically investigated using direct numerical simulation techniques. A 3D Front Tracking model was used and the results were compared with simulation results obtained with a 2D Volume of Fluid model to assess the influence of the third dimension. In the simulations realistic values were taken for the physical properties, i.e., a density ratio of 800. The computed time-averaged terminal rise velocity and mean aspect ratio for individual air bubbles ranging in equivalent diameter from 1 to 10mm rising in pure water compare well with available experimental data.