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DSMC simulation of heat transfer in subsonic rarefied gas flows through micro/nanochannels imposing a constant inflow/wall temperature difference

Darbandi, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. Abstract:
  3. We use the direct simulation Monte Carlo (DSMC) method and investigate the subsonic rarefied gas flow through micro/nanochannels, imposing a constant pressure ratio and a constant temperature difference between the inflow and wall temperature. We further study the heat transfer characteristics of subsonic nitrogen gas flow under this imposed temperature difference. We show that, specifying a higher temperature magnitude would lead to more rarefactions even imposing a fixed temperature difference. This consequently results in a higher wall heat flux rate for a fixed inflow-wall temperature difference. Our investigating shows that the number of simulated particles need to increase suitably if one wishes to avoid statistical fluctuations on the wall heat flux values
  4. Keywords:
  5. Constant pressures ; Constant temperature differences ; Direct simulation Monte Carlo method ; Fixed temperature ; Heat transfer characteristics ; Rarefied gas flow ; Statistical fluctuations ; Temperature differences ; Computer simulation ; Fluid dynamics ; Gases ; Heat flux ; Statistical mechanics ; Flow of gases
  6. Source: 41st AIAA Fluid Dynamics Conference and Exhibit ; 2011 ; 9781600869471 (ISBN)
  7. URL: http://arc.aiaa.org/doi/abs/10.2514/6.2011-3992