Analysis of Different Approaches to Modeling of Nozzle Flows in the Near Continuum Regime (Preprint)

Abstract

Conical nozzle flows are studied for Reynolds numbers of 1,230 and 12,300 using different numerical techniques: DSMC Method, Navier-Stokes/CFD accounting for velocity slip and temperature jump boundary conditions, and statistical and deterministic approaches to the solution of BGK equation. Detailed comparisons of the stability accuracy, and convergence of the employed numerical techniques provide better understanding of their benefits and deficiencies and assists in selecting the most appropriate technique for a particular nozzle and flow application. The deterministic and statistical solutions of the BGK equation were found to be in good agreement with the benchmark DSMC results. The Navier-Stokes solution differs from the DSMC in the boundary layer.

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Document Details

Document Type
Technical Report
Publication Date
Jul 07, 2008
Accession Number
ADA484949

Entities

People

  • D. A. Levin
  • E. V. Titov
  • N. E. Gimelshein
  • Rakesh Kumar
  • S. F. Gimelshein

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Accuracy
  • Agreements
  • Air Force Research Laboratories
  • Boundaries
  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Conical Nozzles
  • Equations
  • Fluid Dynamics
  • High Pressure
  • Layers
  • Mechanics
  • Navier Stokes Equations
  • Nozzles
  • Physics Laboratories
  • Reynolds Number

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Computational Fluid Dynamics (CFD)
  • Fluid Dynamics.