Coalescence and rising behavior of co-axial and lateral bubbles in viscous fluid: A CFD study

Poo Balan Ganesan; Md. Tariqul Islam; Dubravka Pokrajac; F A Wahab Hamad; Shanti Chandran Sandaran

doi:10.1002/apj.2102

Coalescence and rising behavior of co-axial and lateral bubbles in viscous fluid: A CFD study

Poo Balan Ganesan^*, Md. Tariqul Islam, Dubravka Pokrajac, F A Wahab Hamad, Shanti Chandran Sandaran

^*Corresponding author for this work

Engineering

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

The coalescence and rising behavior of co-axial and lateral bubbles play a valuable role in industrial bubble column which operates at non-ambient conditions. The volume of fluid with the continuum surface force (VOF-CSF) model is used for the present study. Three main case studies, namely under ambient and aqueous condition, μ* = σ* = 1, under reduced viscosity, μ* = 0.1, and surface tension, σ* = 0.1, are investigated and compared using two co-axial bubbles and three lateral bubble rise configuration models. The latter two cases represent operating conditions at above the ambient temperature or pressure. Prior to investigating the main cases, the model is validated with the experimental data from the literature for a single bubble and two lateral bubble coalescence. It is found that reducing viscosity and surface tension has a significant effect on the co-axial bubbles (or a pair of bubbles rising in a vertical line) and three lateral bubble growth and coalescence characteristics, as compared to ambient condition.

Original language	English
Pages (from-to)	605-619
Number of pages	15
Journal	Asia-Pacific Journal of Chemical Engineering
Volume	12
Issue number	4
Early online date	28 May 2017
DOIs	https://doi.org/10.1002/apj.2102
Publication status	Published - Jul 2017

Bibliographical note

Acknowledgements
This research is financially supported by the University of Malaya, Ministry of Higher Education High Impact Research (UM.C/HIR/MOHE/ENG/20), and Fundamental Research Grant Scheme (FRGS: FP052-2015A).

Keywords

Breakup and repulsion
Bubble
Coalescence
Volume of fluid (VOF)

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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title = "Coalescence and rising behavior of co-axial and lateral bubbles in viscous fluid: A CFD study",

abstract = "The coalescence and rising behavior of co-axial and lateral bubbles play a valuable role in industrial bubble column which operates at non-ambient conditions. The volume of fluid with the continuum surface force (VOF-CSF) model is used for the present study. Three main case studies, namely under ambient and aqueous condition, μ* = σ* = 1, under reduced viscosity, μ* = 0.1, and surface tension, σ* = 0.1, are investigated and compared using two co-axial bubbles and three lateral bubble rise configuration models. The latter two cases represent operating conditions at above the ambient temperature or pressure. Prior to investigating the main cases, the model is validated with the experimental data from the literature for a single bubble and two lateral bubble coalescence. It is found that reducing viscosity and surface tension has a significant effect on the co-axial bubbles (or a pair of bubbles rising in a vertical line) and three lateral bubble growth and coalescence characteristics, as compared to ambient condition.",

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AU - Wahab Hamad, F A

AU - Sandaran, Shanti Chandran

N1 - Acknowledgements This research is financially supported by the University of Malaya, Ministry of Higher Education High Impact Research (UM.C/HIR/MOHE/ENG/20), and Fundamental Research Grant Scheme (FRGS: FP052-2015A).

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Y1 - 2017/7

N2 - The coalescence and rising behavior of co-axial and lateral bubbles play a valuable role in industrial bubble column which operates at non-ambient conditions. The volume of fluid with the continuum surface force (VOF-CSF) model is used for the present study. Three main case studies, namely under ambient and aqueous condition, μ* = σ* = 1, under reduced viscosity, μ* = 0.1, and surface tension, σ* = 0.1, are investigated and compared using two co-axial bubbles and three lateral bubble rise configuration models. The latter two cases represent operating conditions at above the ambient temperature or pressure. Prior to investigating the main cases, the model is validated with the experimental data from the literature for a single bubble and two lateral bubble coalescence. It is found that reducing viscosity and surface tension has a significant effect on the co-axial bubbles (or a pair of bubbles rising in a vertical line) and three lateral bubble growth and coalescence characteristics, as compared to ambient condition.

AB - The coalescence and rising behavior of co-axial and lateral bubbles play a valuable role in industrial bubble column which operates at non-ambient conditions. The volume of fluid with the continuum surface force (VOF-CSF) model is used for the present study. Three main case studies, namely under ambient and aqueous condition, μ* = σ* = 1, under reduced viscosity, μ* = 0.1, and surface tension, σ* = 0.1, are investigated and compared using two co-axial bubbles and three lateral bubble rise configuration models. The latter two cases represent operating conditions at above the ambient temperature or pressure. Prior to investigating the main cases, the model is validated with the experimental data from the literature for a single bubble and two lateral bubble coalescence. It is found that reducing viscosity and surface tension has a significant effect on the co-axial bubbles (or a pair of bubbles rising in a vertical line) and three lateral bubble growth and coalescence characteristics, as compared to ambient condition.

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Coalescence and rising behavior of co-axial and lateral bubbles in viscous fluid: A CFD study

Abstract

Bibliographical note

Keywords

UN SDGs

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