Direct Simulation Monte Carlo Modeling for Non-Equilibrium Flowfield Applications.

Abstract

Questions important to modeling of nonequilibrium gas flows are examined. Testing and validation of Direct Simulation Monte Carlo (DSMC) codes have been performed. Several models for vibrational relaxation and chemical reaction of diatomic molecules have been implemented and studied parametrically, utilizing measurement and advanced calculations from the literature as benchmarks. DSMC results have been compared to rotational temperature measurements of nitrogen in finite background jet expansion flows. The influence of the rotational relaxation model, the influx boundary condition, and the outer boundary treatment on the simulation have been investigated.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1999
Accession Number
ADA366810

Entities

People

  • D. C. Wadsworth
  • D. H. Campbell
  • I. J. Wysong

Organizations

  • RTX

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force Research Laboratories
  • Boundaries
  • Chemical Reactions
  • Computational Science
  • Diatomic Molecules
  • Energy Transfer
  • Fluid Dynamics
  • Gas Dynamics
  • Gas Flow
  • Measurement
  • Molecules
  • Monte Carlo Method
  • Rarefied Gas Dynamics
  • Shock Tubes
  • Shock Waves
  • Simulations
  • Vibrational Relaxation

Fields of Study

  • Physics

Readers

  • Computational Fluid Dynamics (CFD)
  • Fluid Mechanics and Fluid Dynamics.
  • Molecular Photonics/Laser Physics