Evaluation of Time and Space Scales in a Spatially Developing 3D Turbulent Incompressible Mixing Layer by Using LES

Abstract

The spatial development of a 3D turbulent incompressible mixing layer is computed by using Large Eddy Simulation (LES). The time and space fluctuations of velocity components lead to the energy spectra. We can then to highlight the characteristic scales in both time and space. The energy spectra in time are in agreement with the turbulence theory and show two significant dimensionless frequencies; the largest one encountered for all the variables corresponds to the creation of main rolls. On the energy spectra in space, we can observe also two spanwise scales, one of them is found everywhere in the flow while the other one is representative of the phenomena inside the mixing zone.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2001
Accession Number
ADP013651

Entities

People

  • A. Dulieu
  • C. Tenaud
  • L. Ta Phuoc
  • S. Pellerin

Organizations

  • National Center for Scientific Research

Tags

DTIC Thesaurus Topics

  • Boltzmann Equation
  • Computational Fluid Dynamics
  • Energy
  • Equations
  • Flow
  • Fluid Dynamics
  • Fluid Flow
  • Frequency
  • Incompressible Flow
  • Large Eddy Simulation
  • Mechanical Properties
  • Mixing
  • Reynolds Number
  • Three Dimensional
  • Turbulence
  • Turbulent Flow
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Computational Modeling and Simulation
  • Fluid Mechanics and Fluid Dynamics.
  • Plasma Physics / Magnetohydrodynamics

Technology Areas

  • Space