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PIV and CFD measurements of internal velocity in a forming drop in a liquid-liquid system

Timgren, Anna LU ; Trägårdh, Gun LU and Trägårdh, Christian LU (2007) 7th International Symposium on Particle Image Velocimetry In [Host publication title missing] p.1-10
Abstract
A PIV method has been used to determine the internal motion in an oil drop during formation and to validate a numerical simulation of the drop formation process. The PIV system included a microscope attached to the camera, which gave a focal depth of 50 µm and a possibility to measure the velocity in the centre cross section of the drop. Oil was forced through a capillary with a diameter of 200 µm into a channel with a cross-flowing continuous phase that induced a shear at the interface of the forming drop, which resulted in a rotational motion inside the drop. The angular velocity in the drop reached a maximum after 1/4 of the drop formation time and approached a steady state before drop detachment when a neck was formed above the... (More)
A PIV method has been used to determine the internal motion in an oil drop during formation and to validate a numerical simulation of the drop formation process. The PIV system included a microscope attached to the camera, which gave a focal depth of 50 µm and a possibility to measure the velocity in the centre cross section of the drop. Oil was forced through a capillary with a diameter of 200 µm into a channel with a cross-flowing continuous phase that induced a shear at the interface of the forming drop, which resulted in a rotational motion inside the drop. The angular velocity in the drop reached a maximum after 1/4 of the drop formation time and approached a steady state before drop detachment when a neck was formed above the capillary opening. The velocity of oil out of the capillary was also investigated. A clear dependence on the pressure inside the forming drop was obtained. (Less)
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Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
[Host publication title missing]
pages
1 - 10
publisher
7th International Symposium on Particle Image Velocimetry
conference name
7th International Symposium on Particle Image Velocimetry
language
English
LU publication?
yes
id
d1e5cf02-05fe-4469-b48e-66b166944561 (old id 603385)
date added to LUP
2008-01-08 17:28:13
date last changed
2016-04-16 09:05:01
@misc{d1e5cf02-05fe-4469-b48e-66b166944561,
  abstract     = {A PIV method has been used to determine the internal motion in an oil drop during formation and to validate a numerical simulation of the drop formation process. The PIV system included a microscope attached to the camera, which gave a focal depth of 50 µm and a possibility to measure the velocity in the centre cross section of the drop. Oil was forced through a capillary with a diameter of 200 µm into a channel with a cross-flowing continuous phase that induced a shear at the interface of the forming drop, which resulted in a rotational motion inside the drop. The angular velocity in the drop reached a maximum after 1/4 of the drop formation time and approached a steady state before drop detachment when a neck was formed above the capillary opening. The velocity of oil out of the capillary was also investigated. A clear dependence on the pressure inside the forming drop was obtained.},
  author       = {Timgren, Anna and Trägårdh, Gun and Trägårdh, Christian},
  language     = {eng},
  pages        = {1--10},
  publisher    = {ARRAY(0x94f79f0)},
  series       = {[Host publication title missing]},
  title        = {PIV and CFD measurements of internal velocity in a forming drop in a liquid-liquid system},
  year         = {2007},
}