Direct Numerical Simulations of the PDF's (Probability Density Functions) of a Passive Scalar in a Forced Mixing Layer,

Abstract

The probability density functions of a passive scalar quantity are calculated in a perturbed mixing layer by means of direct numerical simulations. The results indicate that the two-dimensional rollup of the unsteady shear layer, and the pairing process in particular, contributes greatly to the generation of the predominant peak of the PDF's within the mixing region. Keywords: Probability density functions; Direct numerical simulation; Mixing layers; Coherent structures; Entrainment.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1987
Accession Number
ADA192134

Entities

People

  • P. A. Mcmurtry
  • P. Givi

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Boltzmann Equation
  • Chemical Reactions
  • Computational Fluid Dynamics
  • Entrainment
  • Equations
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Mechanics
  • Mechanics
  • Probability Density Functions
  • Reynolds Number
  • Simulations
  • Statistical Analysis
  • Turbulence
  • Turbulent Flow
  • Turbulent Mixing
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Statistical inference.