Weakly Compressible Descriptions of Turbulence in Compressible Flows

Abstract

Weakly compressible asymptotlcs and direct numerical simulation are used to investigate the effects of compressibility or high speed turbulent shear layers. The asymptotic analysis leads to a decomposition procedure that can be used to approximately determine the acoustic and nonacoustic components of a compressible flow. In boundary layers, it is found that the acoustic fluctuations are only weakly coupled to the nonacoustic, so equations describing only the nonacoustic fluctuations ((incompressible, variable density) would provide a good description of the turbulence.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2000
Accession Number
ADA387071

Entities

People

  • Robert D. Moser

Organizations

  • University of Illinois Urbana–Champaign

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Compressible Flow
  • Computational Fluid Dynamics
  • Computational Science
  • Differential Equations
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Hydrodynamics
  • Mechanical Properties
  • Mechanics
  • Reynolds Number
  • Turbulence
  • Turbulent Flow
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.