Coherent Structure Reflective Turbulent Viscous Flow Modeling.

Abstract

Utilizing a multiple-element scale/coherence decomposition of the Navier-Stokes 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-scaled 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 utilizing perturbation theory. The resultant propagation, evolution (in the convected reference frame) and (statistical) occurrence of three-dimensional vertical instabilities are computed and compared to experimental data. Subsequently, coherent reflective turbulence models shall be constructed from this analysis. Keywords include: Fluid dynamics; turbulence; coherent structure.

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Document Details

Document Type
Technical Report
Publication Date
Dec 15, 1984
Accession Number
ADA153086

Entities

People

  • G. J. Hokenson

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Differential Equations
  • Dynamics
  • Equations
  • Equations Of Motion
  • Experimental Data
  • Flow
  • Fluid Dynamics
  • Navier Stokes Equations
  • Reynolds Number
  • Three Dimensional
  • Turbulence
  • Turbulent Mixing
  • Two Dimensional
  • Viscous Flow

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Fluid Mechanics and Fluid Dynamics.
  • Image Processing and Computer Vision.