NDLI: Rarefaction and compressibility effects on steady and transient gas flows in microchannels

Content Provider	Springer Nature Link
Author	Colin, Stéphane
Copyright Year	2004
Abstract	The main theoretical and experimental results from the literature about steady pressure-driven gas microflows are summarized. Among the different gas flow regimes in microchannels, the slip flow regime is the most frequently encountered. For this reason, the slip flow regime is particularly detailed and the question of appropriate choice of boundary conditions is discussed. It is shown that using second-order boundary conditions allows us to extend the applicability of the slip flow regime to higher Knudsen numbers that are usually relevant to the transition regime.The review of pulsed flows is also presented, as this kind of flow is frequently encountered in micropumps. The influence of slip on the frequency behavior (pressure gain and phase) of microchannels is illustrated. When subjected to sinusoidal pressure fluctuations, microdiffusers reveal a diode effect which depends on the frequency. This diode effect may be reversed when the depth is shrunk from a few hundred to a few μm.Thermally driven flows in microchannels are also described. They are particularly interesting for vacuum generation using microsystems without moving parts.
Starting Page	268
Ending Page	279
Page Count	12
File Format	PDF
ISSN	16134982
Journal	Microfluidics and Nanofluidics
Volume Number	1
Issue Number	3
e-ISSN	16134990
Language	English
Publisher	Springer-Verlag
Publisher Date	2004-08-11
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Microfluidics Gas microflow Rarefaction Microchannel
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Materials Chemistry Condensed Matter Physics Electronic, Optical and Magnetic Materials

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