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Experiments in Fluids
Erschienen in: Experiments in Fluids 6/2004

01.06.2004 | Original

Oscillatory flow in microchannels

Comparison of exact and approximate impedance models with experiments

verfasst von: Christopher J. Morris, Fred K. Forster

Erschienen in: Experiments in Fluids | Ausgabe 6/2004

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Abstract

Commonly used, lumped-parameter expressions for the impedance of an incompressible viscous fluid subjected to harmonic oscillations in a channel were compared with exact expressions, based on solutions of the Navier-Stokes equations for slots and channels of circular and rectangular cross-section, and were found to differ by as much as 30% in amplitude. These differences resulted in predicted discrepancies by as much as 400% in frequency response amplitude for simple second-order systems based on size scales and frequencies encountered in microfluidic devices. These predictions were verified experimentally for rectangular microchannels and indicate that underdamped fluidic systems operating near the corner frequency of any included flow channel should be modeled with exact expressions for impedance to avoid potentially large errors in predicted behavior.
Vorheriger Artikel Laser-induced break-up of water jet waveguide
Nächster Artikel Thermocapillary flow without return flow–linear flow

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Metadaten
Titel
Oscillatory flow in microchannels
Comparison of exact and approximate impedance models with experiments
verfasst von
Christopher J. Morris
Fred K. Forster
Publikationsdatum
01.06.2004
Verlag
Springer-Verlag
Erschienen in
Experiments in Fluids / Ausgabe 6/2004
Print ISSN: 0723-4864
Elektronische ISSN: 1432-1114
DOI
https://doi.org/10.1007/s00348-003-0776-9

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