Conditional Second Order Closure for Turbulent Shear Flows.

Abstract

The properties of scalar variables, that allow to distinguish between turbulent and nonturbulent zones of shear flows, are investigated. The dynamics of the probability density function (pdf) of such a scalar is considered and a numerical solution technique based on stochastic simulation is developed. The second order closure is extended to axisymmetric shear flows and different closures for the turbulent transport of Reynolds stresses are evaluated. Keywords: Turbulence; Closure; Shear flow.

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Document Details

Document Type
Technical Report
Publication Date
Jul 27, 1986
Accession Number
ADA179661

Entities

People

  • Wolfgang Kollmann

Organizations

  • University of California, Davis

Tags

Communities of Interest

  • Air Platforms
  • C4I

DTIC Thesaurus Topics

  • Boltzmann Equation
  • Boundary Layer
  • Data Science
  • Differential Equations
  • Engineering
  • Equations
  • Flow
  • Information Science
  • Mechanical Engineering
  • Probability
  • Probability Density Functions
  • Random Walk
  • Shear Flow
  • Shear Stresses
  • Simulations
  • Stresses
  • Transport Ships

Fields of Study

  • Physics

Readers

  • Computational Fluid Dynamics (CFD)
  • Fluid Mechanics and Fluid Dynamics.
  • Statistical inference.