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Flow profile measurement in microchannel using the optical feedback interferometry sensing technique

Campagnolo, Lucie and Nikolić, Milan and Perchoux, Julien and Lim, Yah Leng and Bertling, Karl and Loubière, Karine and Prat, Laurent E. and Rakić, Aleksandar D. and Bosch, Thierry Flow profile measurement in microchannel using the optical feedback interferometry sensing technique. (2013) Microfluidics and Nanofluidics, 14 (1-2). 113-119. ISSN 1613-4982

(Document in English)

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Official URL: http://dx.doi.org/10.1007/s10404-012-1029-0


The need to accurately measure flow profiles in microfluidic channels is well recognised. In this work, we present a new optical feedback interferometry (OFI) flow sensor that accurately measures local velocity in fluids and enables reconstruction of a velocity profile inside a microchannel. OFI is a self-aligned interferometric technique that uses the laser as both the transmitter and the receiver thus offering high sensitivity, fast response, and a simple and compact optical design. The system described here is based on a commercial semiconductor laser and has been designed to achieve a micrometer-range spatial resolution. The sensor performance was validated by reconstructing the velocity profile inside a circular cross-section flow-channel with 320 lm internal diameter, with a relative error smaller than 1.8 %. The local flow velocity is directly measured, thus avoiding the need for model based profile calculation and uncertainties inherent to this approach. The system was validated by successfully extracting the flow profiles in both Newtonian and shearthinning liquids.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > University of Queensland - UQ (AUSTRALIA)
Laboratory name:
Deposited On:28 Oct 2013 14:35

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