NDLI: Gas Microflows in the Slip Flow Regime: A Review on Heat Transfer

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Colin, Ste´phane
Copyright Year	2010
Abstract	Accurate modeling of gas microvection is crucial for a lot of MEMS applications (micro-heat exchangers, pressure gauges, fluidic microactuators for active control of aerodynamic flows, mass flow and temperature micro-sensors, micropumps and microsystems for mixing or separation for local gas analysis, mass spectrometers, vacuum and dosing valves…). Gas flows in microsystems are often in the slip flow regime, characterized by a moderate rarefaction with a Knudsen number of the order of 10−2–10−1. In this regime, velocity slip and temperature jump at the walls play a major role in heat transfer. This paper presents a state of the art review on convective heat transfer in microchannels, focusing on rarefaction effects in the slip flow regime. Analytical and numerical models are compared for various microchannel geometries and heat transfer conditions (constant heat flux or constant wall temperature). The validity of simplifying assumptions is detailed and the role played by the kind of velocity slip and temperature jump boundary conditions is shown. The influence of specific effects, such as viscous dissipation, axial conduction and variable fluid properties is also discussed.
Sponsorship	Fluids Engineering Division
Starting Page	383
Ending Page	396
Page Count	14
File Format	PDF
ISBN	9780791854501
DOI	10.1115/FEDSM-ICNMM2010-30167
e-ISBN	9780791838808
Volume Number	ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels: Parts A and B
Conference Proceedings	ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels collocated with 3rd Joint US-European Fluids Engineering Summer Meeting
Language	English
Publisher Date	2010-08-01
Publisher Place	Montreal, Quebec, Canada
Access Restriction	Subscribed
Subject Keyword	Slip flow Temperature Separation (technology) Modeling Convection Heat flux Microchannels Heat conduction Wall temperature Fluids Vacuum Energy dissipation Gas flow Vacuum gages Microsensors Microelectromechanical systems Computer simulation Aerodynamic flow Microactuators Micropumps Flow (dynamics) Heat Mass spectrometers Knudsen number Boundary-value problems Heat transfer
Content Type	Text
Resource Type	Article

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