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Gas properties effects in microchannel studies using direct simulation Monte Carlo

Darbandi, M ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1115/FEDSM-ICNMM2010-31022
  3. Publisher: 2010
  4. Abstract:
  5. This paper concern is to study the gas properties effect in flow and heat transfer behaviors through microchannels using the direct simulation Monte Carlo method. The flow is rarefied and supersonic. The channels are investigated at two different inlet boundary conditions. The collision process is modeled using the NTC (no-time-counter) scheme. The VHS model is chosen to simulate collision between particle pairs. The study is provided for many different gases including nitrogen, helium, and oxygen. The Knudsen number is chosen in a manner to provide slip flow through the channel. The results show that the heat transfer from the wall is lower for heavier gases. A comparative study among the monatomic, diatomic, polyatomic gases shows that the heat transfer rate is lower for the polyatomic gases. The result shows that, the heat transfer from the wall is lower for the heavier gases than that for the lighter gas. For a fixed Mach number, the heat transfer from the wall decreases as the molecular diameter increases
  6. Keywords:
  7. Collision process ; Comparative studies ; Direct simulation Monte Carlo ; Direct simulation Monte Carlo method ; Flow and heat transfer ; Gas properties ; Heat transfer rate ; Knudsen numbers ; Molecular diameter ; Particle pair ; Polyatomics ; Slip flow ; Computer simulation ; Gases ; Heat transfer ; Helium ; Mach number ; Microchannels ; Monte Carlo methods ; Nitrogen
  8. Source: ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels Collocated with 3rd Joint US-European Fluids Engineering Summer Meeting, ICNMM2010, 1 August 2010 through 5 August 2010, Montreal, QC ; Issue PARTS A AND B , 2010 , Pages 1021-1027 ; 9780791854501 (ISBN)
  9. URL: http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1621544