NDLI: Simultaneous measurement of internal and surrounding flows of a moving droplet using multicolour confocal micro-particle image velocimetry (micro-PIV)

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Simultaneous measurement of internal and surrounding flows of a moving droplet using multicolour confocal micro-particle image velocimetry (micro-PIV)

Content Provider	Semantic Scholar
Author	Oishi, Masamichi Kinoshita, Haruyuki Fujii, Teruo Oshima, Marie
Copyright Year	2011
Abstract	This paper presents a micro-multiphase flow measurement technique, 'multicolour confocal micro-particle image velocimetry (PIV), and its application to the internal and surrounding flow measurement of a droplet moving through a microchannel. The present system measures the dynamic interaction between flows in two different phases, such as solid?liquid or liquid?liquid, simultaneously and separately. Unlike conventional confocal micro-PIV, this system features a wavelength separation optical device. The optical components (e.g., filters and dichroic mirror) are designed to separate fluorescent lights of tracer particles and to eliminate unnecessary scattered light depending on the characteristic wavelengths. The system can record a sequence of images at up to 2000 frames per second. It also has an in-plane spatial resolution of 0.284 ?m/pixel in a field of 227.2 ?m ? 170.4 ?m and a confocal depth of 3.43 ?m using ?1.0 ?m particles and a 40? objective lens. This paper examines the performance of the present system, such as its ability to separate wavelengths. Furthermore, this system is applied to liquid?liquid two-phase flow, which consists of a water droplet and surrounding oil flow, in a microchannel. We succeeded in measuring each phase movement separately and simultaneously. As a result of the estimation of the out-of-plane velocity component, a three-dimensional flow structure is obtained and the interaction between each phase is investigated.
Starting Page	105401
Ending Page	105401
Page Count	1
File Format	PDF HTM / HTML
DOI	10.1088/0957-0233/22/10/105401
Alternate Webpage(s)	https://www.laserquantum.com/uploads/files/_articles/PIV-Excel-Tokyo-Uni.pdf
Alternate Webpage(s)	https://doi.org/10.1088/0957-0233%2F22%2F10%2F105401
Volume Number	22
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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