ON TURBULENT SHEAR FLOWS OF VARIABLE DENSITY

Abstract

A study was made of the mean flow field of free turbulent layers of variable density showing that if the velocity distribution in a particular constant-density flow is known, it is possible to obtain the corresponding variable-density velocity field without the introduction of a compressible turbulent viscosity. This is accomplished by a Dorodnitsyn-Howarth type of transformation applied to the time-dependent equations of motion rather than to the mean equations of motion, as has been done previously. When the transformed equations are averaged, using Reynolds' method, the incompressible turbulent equations for the mean flow are obtained. These equations can then be handled by conventional methods. Predictions obtained by this procedure agree well with experimental results.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1968
Accession Number
AD0669563

Entities

People

  • John Laufer

Organizations

  • RAND Corporation

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Boundary Layer
  • Diameters
  • Energy
  • Equations
  • Equations Of Motion
  • Flow
  • Fluid Dynamics
  • Heat Transfer
  • Layers
  • Mach Number
  • Measurement
  • Shear Flow
  • Stratified Fluids
  • Thermal Conductivity
  • Transport Properties
  • Turbulent Flow
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.