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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 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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publication status
published
subject
host publication
7th International Symposium on Particle Image Velocimetry
pages
1 - 10
conference name
7th International Symposium on Particle Image Velocimetry
conference dates
2007-09-11 - 2007-09-14
language
English
LU publication?
yes
id
d1e5cf02-05fe-4469-b48e-66b166944561 (old id 603385)
date added to LUP
2016-04-04 11:19:24
date last changed
2021-02-09 12:14:45
@inproceedings{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}},
  booktitle    = {{7th International Symposium on Particle Image Velocimetry}},
  language     = {{eng}},
  pages        = {{1--10}},
  title        = {{PIV and CFD measurements of internal velocity in a forming drop in a liquid-liquid system}},
  url          = {{https://lup.lub.lu.se/search/files/5746803/603386.pdf}},
  year         = {{2007}},
}