PIV and CFD measurements of internal velocity in a forming drop in a liquid-liquid system
(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)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/603385
- author
- Timgren, Anna LU ; Trägårdh, Gun LU and Trägårdh, Christian LU
- organization
- publishing date
- 2007
- type
- Chapter in Book/Report/Conference proceeding
- 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}}, }