Nonintrusive pressure measurement in microfluidic systems via backscattering interferometry
Document Type
Article
Publication Date
6-11-2014
Department
Department of Mechanical Engineering-Engineering Mechanics
Abstract
Measurement of pressure in microfluidic systems typically requires intrusion into the channel, rendering direct pressure and fluid flow rate measurements impractical outside of a laboratory environment. A nonintrusive measurement technique has been successfully developed to measure fluid pressure in both gas and liquids in microchannels. The technique, which consists of an unfocused laser beam impinging a microchannel to generate interferometric fringes, contains information on both channel wall deflection and changes in refractive index of the liquid or gas. The effects can be isolated through interpretation of fringe shift and changes in fringe morphology. Using finite element analysis to determine microchannel wall deflection in conjunction with refractive index data enables accurate quantification of pressures in microchannels.
Publication Title
Experiments in Fluids
Recommended Citation
Fultz, D.,
&
Allen, J.
(2014).
Nonintrusive pressure measurement in microfluidic systems via backscattering interferometry.
Experiments in Fluids,
55(6).
http://doi.org/10.1007/s00348-014-1754-0
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/4706
