Optical measurement of flow rate in a microfluidic channel

A way to measure flow rate inside a microchannel using a contactless optical technique is reported. The optofluidic device consists of a Bragg grating written on a soft wall, namely a Mylar stripe glued on the top of a microfluidic channel. Diffraction of a white-light probe beam is used to detect t...

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Bibliographic Details
Published in:Microfluidics and nanofluidics 2016, Vol.20 (1), p.1, Article 9
Main Authors: Lucchetta, D. E., Vita, F., Francescangeli, D., Francescangeli, O., Simoni, F.
Format: Article
Language:English
Subjects:
Analytical Chemistry
Biomedical Engineering and Bioengineering
Engineering
Engineering Fluid Dynamics
Nanotechnology and Microengineering
Research Paper
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Summary:A way to measure flow rate inside a microchannel using a contactless optical technique is reported. The optofluidic device consists of a Bragg grating written on a soft wall, namely a Mylar stripe glued on the top of a microfluidic channel. Diffraction of a white-light probe beam is used to detect the small displacements of the grating caused by the liquid flowing inside the microchannel. A simple model of the hydraulic circuit gives theoretical expressions for the response time of the diffracted signal allowing to fit the experimental data and determine the applied flow rates.
ISSN:1613-4982
1613-4990
DOI:10.1007/s10404-015-1690-1