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Oxygen transfer characteristics of bubbly jet in regular waves
Journal of Hydrodynamics ( IF 3.4 ) Pub Date : 2020-10-29 , DOI: 10.1007/s42241-020-0061-x
Ze-gao Yin , De-chun Liu , Yuan Li , Yan-xu Wang

The dissolved oxygen level is an important index of the water environment, and in this paper, the oxygen transfer of the bubbly jet in regular waves is investigated numerically and experimentally. The Reynolds-averaged Navier-Stokes equations, the re-normalisation group k-ε equations, and the volume of fluid (VOF) technique are used along with a 2-D CFD model to simulate the wave and bubble motions as well as the turbulence, and a dissolved oxygen transport equation is used to model the oxygen transfer behavior both through the bubbly interface and the wave surface. A series of experiments are conducted to validate the mathematical model, with good agreement. In addition, a group of dimensionless parameters are defined from the wave parameter and the aeration parameter, and their relationships with the total oxygen transfer coefficient are explored. Furthermore, the dimensional analysis and the least squares methods are used to derive simple prediction formulas for the total oxygen transfer coefficient, and they are validated with the related experimental data.



中文翻译:

气泡在规则波中的输氧特性

溶解氧水平是水环境的重要指标,本文对泡沫喷射流在规则波中的氧迁移进行了数值和实验研究。雷诺平均Navier-Stokes方程,重新归一化组k-ε方程和流体体积(VOF)技术与二维CFD模型一起使用,以模拟波动和气泡运动以及湍流,而溶解氧传输方程用于通过以下两个过程来模拟氧气的传输行为:气泡界面和波面。进行了一系列实验以验证数学模型,并具有良好的一致性。另外,从波动参数和曝气参数中定义了一组无量纲参数,并探讨了它们与总输氧系数的关系。此外,使用尺寸分析和最小二乘方法得出总氧气传输系数的简单预测公式,并用相关实验数据进行验证。

更新日期:2020-11-12
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