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Experiments on liquid film thickness around Taylor finger

Amit Kumar ORCID logo , Amit K. Thakur EMAIL logo , Gajendra Kumar Gaurav EMAIL logo and Narasimha Reddy Ravuru

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).


Corresponding authors: Amit K. Thakur, Department of Chemical Engineering, University of Petroleum and Energy Studies, Dehradun, 248007, Uttarakhand, India, E-mail: ; and Gajendra Kumar Gaurav, Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes and College of Civil, Hohai University, Nanjing, 210098, P. R. China, E-mail:

Acknowledgements

We are grateful to Professor Gargi Das for his generous support of our experimental activity. The authors are thankful to Professor Subhabrata Ray for his help in preparing this paper.

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: None declared.

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2020-08-31
Accepted: 2022-01-18
Published Online: 2022-02-01

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