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Numerical modelling of micro-droplet formation

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Author

Summary, in English

The formation of micro-droplets due to a pulsative micro-jet (width of 40 mu m) is studied using the 3D Navier-Stokes equations for multi-phase flows using the Volume of Fluid (VOF) and Volume of Solid (VOS) models. The droplet formation is studied for different transient velocity conditions and mass rates. The numerical results show reasonable agreement with both analytical theory and experimental data. The results show that the surface tension forces are too dominating for the droplets to be released from the constriction opening for a mean jet velocity at the constriction opening of U-jet similar to 1 m/s, that multiple (satellite) droplets are formed for U-jet similar to 10 m/s and that a single droplet may be found for U-jet-values in between. The results also indicate the conditions required in order to achieve repeatedly stable single micro-droplet formation.

Publishing year

2005

Language

English

Pages

665-667

Publication/Series

Micro Total Analysis Systems 2004, Vol 1

Issue

296

Document type

Conference paper

Publisher

Springer

Topic

  • Medical Engineering

Keywords

  • multiphase flow
  • droplet formation
  • CFD
  • Volume of Fluid (VOF)

Conference name

8th International Conference on Miniaturized Systems for Chemistry and Life Sciences

Conference date

2004-09-26 - 2004-09-30

Conference place

Malmo, Sweden

Status

Published

ISBN/ISSN/Other

  • ISSN: 0260-6291