Euler-Lagrange modeling of a gas-liquid stirred reactor with consideration of bubble breakage and coalescence

R. Sungkorn, J. J. Derksen, J. G. Khinast*

*Corresponding author for this work

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Simulations of a gasliquid stirred reactor including bubble breakage and coalescence were performed. The filtered conservation equations for the liquid phase were discretized using a lattice-Boltzmann scheme. A Lagrangian approach with a bubble parcel concept was used for the dispersed gas phase. Bubble breakage and coalescence were modeled as stochastic events. Additional assumptions for bubble breakup modeling in an EulerLagrange framework were proposed. The action of the reactor components on the liquid flow field was described using an immersed boundary condition. The predicted number-based mean diameter and long-term averaged liquid velocity components agree qualitatively and quantitatively well with experimental data for a laboratory-scale gasliquid stirred reactor with dilute dispersion. Effects of the presence of bubbles, as well as the increase in the gas flow rate, on the hydrodynamics were numerically studied. The modeling technique offers an alternative engineering tool to gain detailed insights into complex industrial-scale gasliquid stirred reactors. (c) 2011 American Institute of Chemical Engineers AIChE J, 2012

Original languageEnglish
Pages (from-to)1356-1370
Number of pages15
JournalAIChE Journal
Volume58
Issue number5
Early online date5 Jul 2011
DOIs
Publication statusPublished - May 2012

Keywords

  • computational fluid dynamics
  • lattice-Botlzmann method
  • immersed boundary condition
  • Lagrangian particle tracking
  • gas-liquid stirred reactor
  • bubble breakup and coalescence
  • LATTICE-BOLTZMANN SCHEME
  • LARGE-EDDY SIMULATIONS
  • NUMERICAL-SIMULATION
  • SIZE DISTRIBUTIONS
  • RUSHTON TURBINE
  • FLUID-FLOWS
  • COLUMNS
  • VESSELS
  • PARTICLES
  • TANK

Cite this

Euler-Lagrange modeling of a gas-liquid stirred reactor with consideration of bubble breakage and coalescence. / Sungkorn, R.; Derksen, J. J.; Khinast, J. G.

In: AIChE Journal, Vol. 58, No. 5, 05.2012, p. 1356-1370.

Research output: Contribution to journalArticle

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