Low Noise Fractional NTC Collisions for DSMC

Abstract

The ability to accurately simulate rare high energy collisions such as those found in ionization and combustion reactions is important to the advancement of the study of non-equilibrium behavior of these phenomena. A major difficulty for modeling these systems with particle codes is that chain-branching reactions result in exponential growth regimes for certain species. This work considers the use of fractional collision models in place of statistically sampled collision models combined with merging of computational particles to reduce statistical noise while avoiding runaway computational cost.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 2012
Accession Number
ADA587720

Entities

People

  • Jean Luc Cambier
  • Robert Martin

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Materials and Manufacturing Processes
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Algorithms
  • Cellular Structures
  • Chemical Reaction Properties
  • Collisions
  • Combustion
  • Delta Functions
  • Electron Density
  • Electrons
  • Energy
  • Gas Breakdown
  • Gas Dynamics
  • High Energy
  • Ionization
  • Low Noise
  • Noise

Fields of Study

  • Physics

Readers

  • Approximation Theory.
  • Combustion science or combustion engineering.
  • Computational Fluid Dynamics (CFD)