Numerical modelling of micro-droplet formation
(2005) 8th International Conference on Miniaturized Systems for Chemistry and Life Sciences p.665-667- Abstract
- 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... (More)
- 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. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1406278
- author
- Lörstad, Daniel LU ; Laurell, Thomas LU and Nilsson, Johan LU
- organization
- publishing date
- 2005
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- multiphase flow, droplet formation, CFD, Volume of Fluid (VOF)
- host publication
- Micro Total Analysis Systems 2004, Vol 1
- issue
- 296
- pages
- 665 - 667
- publisher
- Springer
- conference name
- 8th International Conference on Miniaturized Systems for Chemistry and Life Sciences
- conference location
- Malmo, Sweden
- conference dates
- 2004-09-26 - 2004-09-30
- external identifiers
-
- wos:000228997000223
- ISSN
- 0260-6291
- language
- English
- LU publication?
- yes
- id
- a16bddf2-16dd-4f53-8c38-0b4d187f5f54 (old id 1406278)
- date added to LUP
- 2016-04-01 15:42:42
- date last changed
- 2018-11-21 20:35:57
@inproceedings{a16bddf2-16dd-4f53-8c38-0b4d187f5f54,
abstract = {{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.}},
author = {{Lörstad, Daniel and Laurell, Thomas and Nilsson, Johan}},
booktitle = {{Micro Total Analysis Systems 2004, Vol 1}},
issn = {{0260-6291}},
keywords = {{multiphase flow; droplet formation; CFD; Volume of Fluid (VOF)}},
language = {{eng}},
number = {{296}},
pages = {{665--667}},
publisher = {{Springer}},
title = {{Numerical modelling of micro-droplet formation}},
year = {{2005}},
}