Influence of the free surface on hydrodynamics in a bubble column

M. V. Masterov, M. W. Baltussen (Corresponding author), J. A.M. Kuipers

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)


In this paper, the influence of the free surface on hydrodynamics is investigated numerically for a pilot-scale bubble column. The free surface is modelled by means of the Volume of Fluid method (VOF), whereas the gas entities are represented by means of the Direct Simulation Monte Carlo (DSMC) method. The VOF method is parallelized using MPI and incorporated in already parallel in-house numerical code for DSMC, FoxBerry. The results obtained with the modeled free surface are compared with the reference simulation, in which the free surface is mimicked using the outlet slits, placed at the top of the column. The results show a significant impact of the free surface on generation of the small-scale eddies. Moreover, the presence of the free surface reduces the gas-holdup in the domain.

Original languageEnglish
Article number100077
Number of pages12
JournalChemical Engineering Science: X
Publication statusPublished - Nov 2020


  • Bubble column
  • Computational fluid dynamics
  • Direct Simulation Monte Carlo
  • Free surface
  • Large scale
  • Volume of fluid


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