State specific modeling of energy transfer in nitrogen shocks using high fidelity models

Tong Zhu, Zheng Li, Neal Parsons, Deborah A. Levin, Marco Pane

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

Abstract

In the current work, newly-developed MD-QCT reaction and relaxation databases forinteral energy relaxation nitrogen are implemented in DSMC simulations for 0D heat bathcases. In particular, two-dimensional coarse-grained binning method is used to treat thediscrete internal states of N2 in groups, and it is found that the convergence of bin-basedrelaxation cross sections to state-specific relaxation cross sections is good with approxi-mately 10 bins in the rotational and vibrational modes (99 bins in total). In the 0D heatbath cases for N-N2 relaxation, it is found that Tr relaxes faster than Tv at relatively lowtemperature and at a very similar rate as Tv at relatively high temperature. However, the Zr obtained from DSMC are smaller than those obtained directly using the MD method by a factor between 1.3 and 5 at various temperatures, and the Zv are smaller by a factorof around 6. For N2-N2 relaxations, Zr and Zv are different even at very high Tt, and the Zr and Zv obtained from DSMC are smaller than those obtained directly using the MD method by approximately one order of magnitude.

Original languageEnglish (US)
Title of host publication45th AIAA Thermophysics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Pages1-14
Number of pages14
ISBN (Print)9781624103612
StatePublished - Jan 1 2015
Externally publishedYes
Event45th AIAA Thermophysics Conference, 2015 - Dallas, United States
Duration: Jun 22 2015Jun 26 2015

Publication series

Name45th AIAA Thermophysics Conference

Other

Other45th AIAA Thermophysics Conference, 2015
CountryUnited States
CityDallas
Period6/22/156/26/15

ASJC Scopus subject areas

  • Aerospace Engineering
  • Mechanical Engineering

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  • Cite this

    Zhu, T., Li, Z., Parsons, N., Levin, D. A., & Pane, M. (2015). State specific modeling of energy transfer in nitrogen shocks using high fidelity models. In 45th AIAA Thermophysics Conference (pp. 1-14). (45th AIAA Thermophysics Conference). American Institute of Aeronautics and Astronautics Inc, AIAA.