Full Content is available to subscribers

Subscribe/Learn More  >

Gases Mixing in Microchannels Using DSMC

[+] Author Affiliations
Moran Wang

Johns Hopkins University, Baltimore, MD

Zhixin Li

Tsinghua University, Beijing, China

Paper No. ICMM2005-75133, pp. 469-476; 8 pages
  • ASME 3rd International Conference on Microchannels and Minichannels
  • ASME 3rd International Conference on Microchannels and Minichannels, Parts A and B
  • Toronto, Ontario, Canada, June 13–15, 2005
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4185-5 | eISBN: 0-7918-3758-0
  • Copyright © 2005 by ASME


Mixing in microchannels is an important problem because the flow is always in laminar mode even though the velocity could be high. This present paper is trying to expose the inherent effect factors on micro gases mixing by using the direct simulation Monte Carlo (DSMC) method at high Knudsen numbers. Before simulations the discretization errors of the DSMC method were discussed to ensure the numerical veracity. The simulation results show that the wall characteristics have little effects on the mixing length when the main gas flow velocities for different wall characteristics were at a same value. The gas temperature increase decreases the mixing length at a nearly inverse proportional rate. After defining a new dimensionless mixing coefficient by the mixing length to the channel height ratio, it was found that the mixing coefficient was proportional to the Mach number, and inversely proportional to the Knudsen number. This conclusion was validated in gas flows at microscale, while may be expected to expand to all laminar gas flows at all scales.

Copyright © 2005 by ASME
Topics: Gases , Microchannels



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In