Simulation of droplet breakage in turbulent liquid-liquid dispersions with CFD-PBM: Comparison of breakage kernels

Zhengming Gao, Dongyue Li, Antonio Buffo, Wioletta Podgórska, Daniele L. Marchisio*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

41 Citations (Scopus)

Abstract

In this work droplet breakage in turbulent liquid-liquid dispersions is simulated by using computational fluid dynamics and population balance modelling. Model predictions are validated against experimental data for eight test cases, namely stirred tanks with different geometries and different continuous and disperse phases. The two first test cases correspond to two geometrically similar stirred tanks (one being the scale up of the other) working under the same power input per unit mass with water as continuous phase and a mixture of chlorobenzene and toluene as disperse phase. The last six test cases correspond to a slightly different geometry, working with water as continuous phase and different silicon oils as disperse phase, characterized by different viscosity values, stirred at different stirring rates. Simulations are performed with our implementation of the quadrature method of moments for the solution of the population balance model into the open-source computational fluid dynamics code OpenFOAM. Two different breakage kernels are considered in this work, based respectively on the classical homogeneous and multifractal turbulence theories. Analysis of the kernels and comparison with experiments reveal that the second kernel results is better agreement with experiments, a more accurate description of the underlying physics and presents the additional advantage of having no fitting constants.

Original languageEnglish
Pages (from-to)277-288
Number of pages12
JournalChemical Engineering Science
Volume142
DOIs
Publication statusPublished - 13 Mar 2016
MoE publication typeA1 Journal article-refereed

Keywords

  • Breakage
  • Computational fluid dynamics
  • Liquid-liquid dispersions
  • Population balance model
  • Quadrature method of moments
  • Stirred tanks

Fingerprint

Dive into the research topics of 'Simulation of droplet breakage in turbulent liquid-liquid dispersions with CFD-PBM: Comparison of breakage kernels'. Together they form a unique fingerprint.

Cite this