Modeling of near-continuum laminar boundary layer shocks using DSMC

Ozgur Tumuklu, Deborah A. Levin, Sergey F. Gimelshein, Joanna M. Austin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The hypersonic flow of nitrogen gas over a double wedge was simulated by the DSMC method using two-dimensional and three-dimensional geometries. The numerical results were compared with experiments conducted in the HET facility for a high-enthalpy pure nitrogen flow corresponding to a free stream Mach number of approximately seven. Since the conditions for the double wedge case are near-continuum and surface heat flux and size of the separation are sensitive to DSMC numerical parameters special attention was paid to the convergence of these parameters for both geometries. At the beginning of the simulation, the separation zone was predicted to be small and the heat flux values for the 2-D model were comparable to the experimental data. However, for increasing time, it was observed that the heat flux values and shock profile strongly deviated from the experiment. Investigation of a three-dimensional model showed that the flow is truly three-dimensional and the side edge pressure relief provides good agreement between simulations and the experiment.

Original languageEnglish (US)
Title of host publication30th International Symposium on Rarefied Gas Dynamics, RGD 2016
EditorsHenning Struchtrup, Andrew Ketsdever
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735414488
DOIs
StatePublished - Nov 15 2016
Event30th International Symposium on Rarefied Gas Dynamics, RGD 2016 - Victoria, Canada
Duration: Jul 10 2016Jul 15 2016

Publication series

NameAIP Conference Proceedings
Volume1786
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other30th International Symposium on Rarefied Gas Dynamics, RGD 2016
CountryCanada
CityVictoria
Period7/10/167/15/16

Keywords

  • DSMC
  • Hypersonic separated flows
  • Shock-wave boundary layer interactions

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Plant Science
  • Physics and Astronomy(all)
  • Nature and Landscape Conservation

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  • Cite this

    Tumuklu, O., Levin, D. A., Gimelshein, S. F., & Austin, J. M. (2016). Modeling of near-continuum laminar boundary layer shocks using DSMC. In H. Struchtrup, & A. Ketsdever (Eds.), 30th International Symposium on Rarefied Gas Dynamics, RGD 2016 [050004] (AIP Conference Proceedings; Vol. 1786). American Institute of Physics Inc.. https://doi.org/10.1063/1.4967554