An improved lift model for Euler-Lagrange simulations of bubble columns

Rahul Subburaj, Yali Tang (Corresponding author), Niels G. Deen

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

The objective of this work is to establish a lift model which can account for the variation in the bubble spreading mechanism with different column aspect ratios. To this end, a strategic approach has been developed and applied to explore the dependency of the lift variation with local flow variables. Numerical simulations are performed by using Computational Fluid Dynamics - Discrete Particle Method (CFD-DPM) coupled with Volume of Fluid (VOF) method in the open-source framework OpenFOAM. Both homogeneous and heterogeneous bubbly flows are considered with the results from reported experiments in literature. It has been found that the local gas fraction and the vorticity are strongly correlated with the lift coefficient. However, using one of these two variables alone cannot describe the lift variation within the bubble columns. Finally, a unified lift model is established that depends on both local gas fraction and vorticity. Euler–Lagrange simulations using this lift model are demonstrated to provide excellent agreement on the bubbly dynamics with experiments of homogeneous bubbly flows and bubble swarms.

Original languageEnglish
Article number118182
Number of pages12
JournalChemical Engineering Science
Volume265
DOIs
Publication statusPublished - 16 Jan 2023

Bibliographical note

Publisher Copyright:
© 2022 The Author(s)

Funding

This work was supported by the Netherlands Center for Multiscale Catalytic Energy Conversion (MCEC), an NWO gravitation program funded by the Ministry of Education, Culture and Science of the government of the Netherlands.

FundersFunder number
Netherlands Center for Multiscale Catalytic Energy Conversion
Ministerie van Onderwijs, Cultuur en Wetenschap
Nederlandse Organisatie voor Wetenschappelijk Onderzoek

    Keywords

    • Bubbly flow
    • Euler–Lagrange simulations
    • Lift model

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