Abstract Taylor finger is characterized by a single elongated air bubble that grows upward during the drainage of liquid from closed top vertical tubes. The characteristic of the Taylor finger is similar to the Taylor bubble commonly observed in gas–liquid two-phase flow. During the upward growth of the Taylor finger, liquid from the tube drains as a thin film around it. The exact prediction of film thickness is important in several engineering designs and process calculations such as the design of contacting devices, two-phase flow through porous media, boiling in tubes, and monolith reactors. The present study proposes an experimental technique to estimate the thickness of the draining liquid film. Based on experiments an empirical model has been proposed for non-dimensional film thickness in the inviscid region. The proposed model agrees well with the experimental data and equation proposed in published literatures (Davies, R. M., and G. Taylor. 1950. “The Mechanics of Large Bubbles Rising Through Extended Liquids and Through Liquids in Tubes.” Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 200, 375–90; Dukler, A. E., and J. Fabre. 1994. “Gas-Liquid Slug Flow.” Multiphase Science and Technology 8: 1–4; Fabre, J., and A. Liné. 1992. “Modeling of Two-Phase Slug Flow.” Annual Review of Fluid Mechanics 24: 21–46).

中文翻译：

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泰勒指周围液膜厚度实验

摘要泰勒指的特点是在从封闭的顶部垂直管排出液体的过程中向上生长的单个细长气泡。泰勒指的特征类似于气液两相流中常见的泰勒气泡。在泰勒指向上生长的过程中，管中的液体会以薄膜的形式排出。薄膜厚度的准确预测在一些工程设计和过程计算中很重要，例如接触装置的设计、通过多孔介质的两相流、管中沸腾和整体反应器。本研究提出了一种估计引流液膜厚度的实验技术。在实验的基础上，提出了非粘性区域无量纲膜厚的经验模型。Dukler、AE 和 J. Fabre。1994.“气液段塞流”。多相科学与技术 8：1-4；Fabre, J. 和 A. Liné。1992.“两相团状流的建模”。流体力学年度回顾 24：21-46）。Dukler、AE 和 J. Fabre。1994.“气液段塞流”。多相科学与技术 8：1-4；Fabre, J. 和 A. Liné。1992.“两相团状流的建模”。流体力学年度回顾 24：21-46）。