Accuracy Analysis of DSMC Chemistry Models Applied to a Normal Shock Wave

Abstract

A preliminary validation study of three DSMC chemistry models, two recent and one standard, is presented. First the 2D geometry and numerical approach used to simulate the shock experiments is verified. Next, 2 different vibrational relaxation models are validated by comparison with data for the M=9.3 case where dissociation is small in the nonequilibrium region of the shock. Finally, the 3 DSMC chemistry model results are compared for the M=13.4 case where nonequilbrium dissociation (in the region where the vibrational temperature is greatly different for the rotational and translational temperature) is important. It is shown that the peak vibrational temperature is very sensitive to vibrational favoring in the chemistry model and that the vibrationally-favored KSS model predicts the measured peak quite well.

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Document Details

Document Type
Technical Report
Publication Date
Jun 20, 2012
Accession Number
ADA571739

Entities

People

  • Ingrid Wysong
  • Mikhail Ivanov
  • Sergey F. Gimelshein
  • Yevgeny Bondar

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force Research Laboratories
  • Chemical Reactions
  • Chemistry
  • Dissociation
  • Dynamics
  • Energy Transfer
  • Flow
  • Fluid Dynamics
  • Free Stream
  • Gas Flow
  • High Temperature
  • Knudsen Number
  • Measurement
  • Physics Laboratories
  • Shock Waves
  • Two Dimensional
  • Vibrational Relaxation

Fields of Study

  • Physics

Readers

  • Computational Modeling and Simulation
  • Fluid Dynamics.
  • Spectroscopy.