Numerical simulation of single-bubble dynamics in high-viscosity ionic liquids using the level-set method

Danilo Carvajal, CARLOS JAVIER CARLESI JARA, Victor Meléndez-Vejar, DREIDY MERCEDES VASQUEZ SANDOVAL, Alessandro H.A. Monteverde-Videla, Samir Bensaid

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Two numerical models for studying the dynamics of formation and rise of single bubbles in high-viscosity ionic liquids were implemented using the level-set method. The models describe two stages of bubble dynamics: bubble formation at the inlet nozzle and bubble displacement across the column. The models were experimentally validated through a laboratory-scale bubble column using water-glycerol mixtures and two imidazolium-type ionic liquids. The models were consistent with the experimental tests for Reynolds numbers <5. Outside this range, the models tend to underestimate the bubble terminal velocity, which can be explained by the effect of the high velocity and pressure gradients close to the gas-liquid interface. The models also predicted the velocity and pressure fields near the bubble surface before and after detachment.

Original languageEnglish
Pages (from-to)473-481
Number of pages9
JournalChemical Engineering and Technology
Volume38
Issue number3
DOIs
StatePublished - 1 Mar 2015

Keywords

  • Bubble columns
  • Computational fluid dynamics
  • Ionic liquids
  • Level-set method
  • Multiphase flows

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