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Flow profile measurement in microchannel using the optical feedback interferometry sensing technique
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Flow profile measurement in microchannel using the optical feedback interferometry sensing technique
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Journal Article
Flow profile measurement in microchannel using the optical feedback interferometry sensing technique
2013
Overview
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
m 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 shear-thinning liquids.
Publisher
Springer-Verlag,Springer,Springer Nature B.V,Springer Verlag
Subject
/ Biological and medical applications
/ Biomedical Engineering and Bioengineering
/ Channels
/ Exact sciences and technology
/ Fluidics
/ Fundamental areas of phenomenology (including applications)
/ Instrumentation and Detectors
/ Instrumentation for fluid dynamics
/ Nanotechnology and Microengineering
/ Optics
/ Physics
/ Sensors
