Statistical simulation of laminar separation in hypersonic flows: Numerical challenges

S. F. Gimelshein, Deborah Levin Fliflet, G. N. Markelov, A. N. Kudryavtsev, M. S. Ivanov

Research output: Contribution to conferencePaper

Abstract

The computations of a near-continuum flow with separation were performed using the DSMC method for a hollow cylinder flare and a double cone configurations. Different test cases were considered with the Reynolds number in the range of 12,000 to 26,000. An efficient spatial correlator is developed for the DSMC method to estimate an impact of the statistical dependence between molecules on simulation results. Very good agreement between the numerical results and available experimental data is obtained for the least dense case, where the DSMC requirements for cell size and the number of molecules are satisfied. For more dense cases, even 80 million molecules and 20 million cells do not satisfy the DSMC requirements, resulting in the underprediction of the separation zone size.

Original languageEnglish (US)
StatePublished - Dec 1 2002
Externally publishedYes
Event40th AIAA Aerospace Sciences Meeting and Exhibit 2002 - Reno, NV, United States
Duration: Jan 14 2002Jan 17 2002

Other

Other40th AIAA Aerospace Sciences Meeting and Exhibit 2002
CountryUnited States
CityReno, NV
Period1/14/021/17/02

ASJC Scopus subject areas

  • Space and Planetary Science
  • Aerospace Engineering

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    Gimelshein, S. F., Levin Fliflet, D., Markelov, G. N., Kudryavtsev, A. N., & Ivanov, M. S. (2002). Statistical simulation of laminar separation in hypersonic flows: Numerical challenges. Paper presented at 40th AIAA Aerospace Sciences Meeting and Exhibit 2002, Reno, NV, United States.