An improved subgrid scale model for front‐tracking based simulations of mass transfer from bubbles

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Gas–liquid bubble column reactors are often used in industry because of their favorable mass transfer characteristics. The bubble mass boundary layer in these systems is generally one order of magnitude thinner than the momentum boundary. To resolve it in simulations, a subgrid scale model will account for the sharp concentration variation in the vicinity of the interface. In this work, the subgrid scale model of Aboulhasanzadeh et al., Chem Eng Sci, 2012, 75:456–467 embedded in our in‐house front tracking framework, has been improved to prevent numerical mass transfer due to remeshing operations. Furthermore, two different approximations of the mass distribution in the boundary layer have been tested. The local and global predicted Sherwood number has been verified for mass transfer from bubbles in the creeping and potential flow regimes. In addition, the correct Sherwood number has been predicted for free rising bubbles at several Eötvös and Morton numbers with industrial relevant Schmidt numbers (103–105).
Original languageEnglish
Article numbere16889
JournalAIChE Journal
DOIs
Publication statusAccepted/In press - 2020

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Bubbles (in fluids)
Industry
Mass transfer
Boundary layers
Bubble columns
Potential flow
Momentum

Keywords

  • boundary layer
  • bubble columns
  • front tracking
  • mass transfer
  • subgrid scale modeling

Cite this

@article{df5ffbaa1b9348fb89f6a752f521c17e,
title = "An improved subgrid scale model for front‐tracking based simulations of mass transfer from bubbles",
abstract = "Gas–liquid bubble column reactors are often used in industry because of their favorable mass transfer characteristics. The bubble mass boundary layer in these systems is generally one order of magnitude thinner than the momentum boundary. To resolve it in simulations, a subgrid scale model will account for the sharp concentration variation in the vicinity of the interface. In this work, the subgrid scale model of Aboulhasanzadeh et al., Chem Eng Sci, 2012, 75:456–467 embedded in our in‐house front tracking framework, has been improved to prevent numerical mass transfer due to remeshing operations. Furthermore, two different approximations of the mass distribution in the boundary layer have been tested. The local and global predicted Sherwood number has been verified for mass transfer from bubbles in the creeping and potential flow regimes. In addition, the correct Sherwood number has been predicted for free rising bubbles at several E{\"o}tv{\"o}s and Morton numbers with industrial relevant Schmidt numbers (103–105).",
keywords = "boundary layer, bubble columns, front tracking, mass transfer, subgrid scale modeling",
author = "Claassen, {Claire M.Y.} and M.S. Islam and Peters, {E.A.J.F. (Frank)} and Deen, {Niels G.} and Kuipers, {J.A.M. (Hans)} and Baltussen, {Maike W.}",
year = "2020",
doi = "10.1002/aic.16889",
language = "English",
journal = "AIChE Journal",
issn = "0001-1541",
publisher = "American Institute of Chemical Engineers (AIChE)",

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TY - JOUR

T1 - An improved subgrid scale model for front‐tracking based simulations of mass transfer from bubbles

AU - Claassen, Claire M.Y.

AU - Islam, M.S.

AU - Peters, E.A.J.F. (Frank)

AU - Deen, Niels G.

AU - Kuipers, J.A.M. (Hans)

AU - Baltussen, Maike W.

PY - 2020

Y1 - 2020

N2 - Gas–liquid bubble column reactors are often used in industry because of their favorable mass transfer characteristics. The bubble mass boundary layer in these systems is generally one order of magnitude thinner than the momentum boundary. To resolve it in simulations, a subgrid scale model will account for the sharp concentration variation in the vicinity of the interface. In this work, the subgrid scale model of Aboulhasanzadeh et al., Chem Eng Sci, 2012, 75:456–467 embedded in our in‐house front tracking framework, has been improved to prevent numerical mass transfer due to remeshing operations. Furthermore, two different approximations of the mass distribution in the boundary layer have been tested. The local and global predicted Sherwood number has been verified for mass transfer from bubbles in the creeping and potential flow regimes. In addition, the correct Sherwood number has been predicted for free rising bubbles at several Eötvös and Morton numbers with industrial relevant Schmidt numbers (103–105).

AB - Gas–liquid bubble column reactors are often used in industry because of their favorable mass transfer characteristics. The bubble mass boundary layer in these systems is generally one order of magnitude thinner than the momentum boundary. To resolve it in simulations, a subgrid scale model will account for the sharp concentration variation in the vicinity of the interface. In this work, the subgrid scale model of Aboulhasanzadeh et al., Chem Eng Sci, 2012, 75:456–467 embedded in our in‐house front tracking framework, has been improved to prevent numerical mass transfer due to remeshing operations. Furthermore, two different approximations of the mass distribution in the boundary layer have been tested. The local and global predicted Sherwood number has been verified for mass transfer from bubbles in the creeping and potential flow regimes. In addition, the correct Sherwood number has been predicted for free rising bubbles at several Eötvös and Morton numbers with industrial relevant Schmidt numbers (103–105).

KW - boundary layer

KW - bubble columns

KW - front tracking

KW - mass transfer

KW - subgrid scale modeling

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U2 - 10.1002/aic.16889

DO - 10.1002/aic.16889

M3 - Article

JO - AIChE Journal

JF - AIChE Journal

SN - 0001-1541

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