Investigation of gas flow in long and narrow channels

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To minimize the viscous flow losses in a microsystem for chemical analysis, the authors have investigated gas flow in long capillary tubes and microchannels to characterize the flow behavior. Both experimental results and theoretical predictions indicate that gas flow in long and narrow channels, as in capillary tubes or rectangular channels, compressibility effect is very important. This leads to a higher mass flow rate than predicted by the incompressible flow model. Different computational fluid dynamics (CFD) codes have been applied to simulate this flow problem. While some existing CFD codes have difficulties to model this problem, other codes, such as ... continued below

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8 p.

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WONG,CHUNGNIN C.; ZOELLER,TRACIE L.; ADKINS,DOUGLAS R. & SHADID,JOHN N. February 7, 2000.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 12 times . More information about this article can be viewed below.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM, and Livermore, CA (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

To minimize the viscous flow losses in a microsystem for chemical analysis, the authors have investigated gas flow in long capillary tubes and microchannels to characterize the flow behavior. Both experimental results and theoretical predictions indicate that gas flow in long and narrow channels, as in capillary tubes or rectangular channels, compressibility effect is very important. This leads to a higher mass flow rate than predicted by the incompressible flow model. Different computational fluid dynamics (CFD) codes have been applied to simulate this flow problem. While some existing CFD codes have difficulties to model this problem, other codes, such as MPSalsa, predict a converged and reasonably accurate solution. This difficulty may be caused by numerical solution technique in these computer codes being optimized for incompressible flow problems rather than for compressible low-speed flow problems.

Physical Description

8 p.

Notes

OSTI as DE00751180

Medium: P; Size: 8 pages

Source

  • ASME 2000 Fluid Engineering Summer Conference, Boston, MA (US), 06/11/2000--06/15/2000

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  • Report No.: SAND2000-0347C
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 751180
  • Archival Resource Key: ark:/67531/metadc702147

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  • February 7, 2000

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • April 11, 2017, 6:49 p.m.

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WONG,CHUNGNIN C.; ZOELLER,TRACIE L.; ADKINS,DOUGLAS R. & SHADID,JOHN N. Investigation of gas flow in long and narrow channels, article, February 7, 2000; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc702147/: accessed September 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.