Numerical modeling of the heterogeneous combustion in a micro scale chemical reactor

Bo Xu, Yiguang Ju

Research output: Contribution to conferencePaperpeer-review

2 Scopus citations


The concentration slip model to describe the rarefied gas effect on species diffusion in microscale chemical reactors and nanoscale structures is developed and numerically examined. First, the model is applied to a pure diffusion test case and the results are compared with the DSMC results at different Knudsen numbers. Then, the coupling between the surface catalytic reactions and the homogeneous gas phase reactions with and without flow coupling in a microscale chemical reactor is investigated using the one-step overall reaction model and the slip boundary conditions. The results show that present analytical model for concentration slip boundary condition can reasonably predict the rarefied gas effect within the slip regime; the rarefied gas effect significantly reduces the momentum, heat, and mass transfer near the wall, and thus decreases the surface reaction rate. Furthermore, it is shown that the slip effects can dramatically change the near wall temperature field and transport properties, which will yield a strong coupling between the gas phase reaction and catalytic surface reaction in microscale reactors.

Original languageEnglish (US)
Number of pages5
StatePublished - 2004
Event42nd AIAA Aerospace Sciences Meeting and Exhibit - Reno, NV, United States
Duration: Jan 5 2004Jan 8 2004


Other42nd AIAA Aerospace Sciences Meeting and Exhibit
Country/TerritoryUnited States
CityReno, NV

All Science Journal Classification (ASJC) codes

  • General Engineering


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