Three-Dimensional One-Way Bubble Tracking Method for the Prediction of Developing Bubble-Slug Flows in a Vertical Pipe (1st Report, Models and Demonstration)
Three-Dimensional One-Way Bubble Tracking Method for the Prediction of Developing Bubble-Slug Flows in a Vertical Pipe (1st Report, Models and Demonstration)
复制标题
用于预测垂直管道中气泡弹流发展的三维单向气泡跟踪方法（第一份报告、模型和演示）
DOI：
10.1299/kikaib.70.880
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
A. Tomiyama
中科院分区：
文献类型：
--
作者：
H. Tamai;A. Tomiyama
三维单向气泡跟踪法是预测垂直管道中气泡流发展的最有前途的数值方法之一，前提是要准备几个本构模型。在这项研究中，气泡形状，气泡运动方程，液体速度分布，压力场，湍流脉动和气泡聚结的气泡动力学的现有知识的基础上建模。根据气泡等效直径将气泡形状分为四种类型。引入了尾流速度模型，模拟了尾流卷吸作用下气泡间的相互接近过程。气泡聚结被视为一种随机现象的帮助下，聚结概率取决于两个相互作用的气泡的大小。该方法可以预测泡状段塞流发展过程中流型的时空演化。
A three-dimensional one-way bubble tracking method is one of the most promising numerical methods for the prediction of a developing bubble flow in a vertical pipe, provided that several constitutive models are prepared. In this study, a bubble shape, an equation of bubble motion, a liquid velocity profile, a pressure field, turbulent fluctuation and bubble coalescence are modeled based on available knowledge on bubble dynamics. Bubble shapes are classified into four types in terms of bubble equivalent diameter. A wake velocity model is introduced to simulate approaching process among bubbles due to wake entrainment. Bubble coalescence is treated as a stochastic phenomenon with the aid of coalescence probabilities that depend on the sizes of two interacting bubbles. The proposed method can predict time-spatial evolution of flow pattern in a developing bubble-slug flow.