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Experimental and Computational Multiphase Flow 2021, 3(3): 139-151 https://doi.org/10.1007/s42757-020-0073-3
Research Article | Issue | Published: 18 July 2020

Complex bubble deformation and break-up dynamics studies using interface capturing approach

Show Author's Information Yuqiao Fan1,  Jun Fang2,  Igor Bolotnov1( )
Department of Nuclear Engineering, North Carolina State University, Raleigh, NC 27695, USA
Nuclear Science and Engineering Division, Argonne National Laboratory, Lemont, IL 60439, USA
Keywords:
two-phase flow DNS, level-set method, bubble deformation, bubble break-up, PID bubble controller
An erratum to this article is available online at https://doi.org/10.1007/s42757-021-0127-1
Cite this article:
Fan Y, Fang J, Bolotnov I. Complex bubble deformation and break-up dynamics studies using interface capturing approach. Experimental and Computational Multiphase Flow, 2021, 3(3): 139-151. https://doi.org/10.1007/s42757-020-0073-3
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Abstract Full text About this article

The dynamics of bubble deformation has significant impacts on two-phase flow fundamentals such as bubble induced turbulence and flow regime transition. Despite the significant progress achieved by experimental studies on bubble deformation, certain limitations still exist especially for wide-range datasets. To significantly expand the flow conditions available from experiments, direct numerical simulation (DNS) is utilized to study the bubble-liquid interactions using finite- element solver with level-set interface capturing method. Different from conventional investigations of bubble rising and deforming in stagnant liquids, a proportional-integral-derivative (PID) bubble controller is leveraged to maintain the bubble location in uniform liquid flow. This paper evaluates the reliability and reproducibility of the PID bubble controller for complex bubble deformation studies through a comprehensive set of verification and validation studies. An improved bubble deformation map is developed, based on Weber number and bubble Reynolds number, showing six zones for different deformation and break-up mechanisms. This research aims at producing virtual experiment level data source using interface resolved DNS and shedding light into the physics of interface dynamics. The insights obtained can be further incorporated in improved multiphase CFD models to guide the engineering designs and industrial processes where bubble deformation and break-up play a pivotal role.


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About this article

Complex bubble deformation and break-up dynamics studies using interface capturing approach

Show Author's information Yuqiao Fan1, Jun Fang2, Igor Bolotnov1( )
Department of Nuclear Engineering, North Carolina State University, Raleigh, NC 27695, USA
Nuclear Science and Engineering Division, Argonne National Laboratory, Lemont, IL 60439, USA

Abstract

The dynamics of bubble deformation has significant impacts on two-phase flow fundamentals such as bubble induced turbulence and flow regime transition. Despite the significant progress achieved by experimental studies on bubble deformation, certain limitations still exist especially for wide-range datasets. To significantly expand the flow conditions available from experiments, direct numerical simulation (DNS) is utilized to study the bubble-liquid interactions using finite- element solver with level-set interface capturing method. Different from conventional investigations of bubble rising and deforming in stagnant liquids, a proportional-integral-derivative (PID) bubble controller is leveraged to maintain the bubble location in uniform liquid flow. This paper evaluates the reliability and reproducibility of the PID bubble controller for complex bubble deformation studies through a comprehensive set of verification and validation studies. An improved bubble deformation map is developed, based on Weber number and bubble Reynolds number, showing six zones for different deformation and break-up mechanisms. This research aims at producing virtual experiment level data source using interface resolved DNS and shedding light into the physics of interface dynamics. The insights obtained can be further incorporated in improved multiphase CFD models to guide the engineering designs and industrial processes where bubble deformation and break-up play a pivotal role.

Keywords: two-phase flow DNS, level-set method, bubble deformation, bubble break-up, PID bubble controller

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Publication history
Copyright
Acknowledgements

Publication history

Received: 29 February 2020
Revised: 22 April 2020
Accepted: 25 April 2020
Published: 18 July 2020
Issue date: September 2021

Copyright

© Tsinghua University Press 2020

Acknowledgements

This research is supported by the Department of Nuclear Engineering at North Carolina State University. This research has also been supported through the Alexander von Humboldt Fellowship for Experienced Researchers. The co-author, Dr. Jun Fang, would like to acknowledge his current employer Argonne National Laboratory for the support during the manuscript preparation. Argonne is operated by UChicago Argonne, LLC, for the U.S. DOE under contract DEAC02-06CH11357. The presented solutions are using Acusim linear algebra solution library provided by Altair Engineering Inc. and meshing and geometric modeling libraries by Simmetrix Inc.

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