Coherent Structure-Reflective Turbulent Viscous Flow Modeling.

Abstract

By using a mulitple-element scale/coherence decomposition of the Navier-Stoke equations, the essential characteristics of the large scale turbulent structure are computed in wall-bounded shear flows. The effect of small-scale turbulence structure is modeled and the large-scale turbulence structure is computed assuming weakly non-linear large-scale dynamics. The effects of large-scale non-linearity and the presence of wave-like elements in the flow are accounted for using perturbation theory. The resultant propagation, evolution (in the convected reference frame) and (statistical) occurrence of three-dimensional vortical instabilities are computed and compared to experimental data. Coherent structure reflective turbulence models will be constructed from this analysis.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1986
Accession Number
ADA175195

Entities

People

  • Gustave J. Hokenson

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Boundary Layer
  • Computational Fluid Dynamics
  • Equations
  • Equations Of Motion
  • Fluid Dynamics
  • Fluid Flow
  • Layers
  • Mechanical Properties
  • Mechanics
  • Navier Stokes Equations
  • Shear Flow
  • Stratified Fluids
  • Three Dimensional
  • Turbulence
  • Turbulent Flow
  • Turbulent Mixing
  • Viscous Flow

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Fluid Mechanics and Fluid Dynamics.