Development of a Complete Model of Turbulence Revisited.

Abstract

A comprehensive and critical review of closure approximations for two equation turbulence models has been made. Particular attention has focused upon the scale-determining equation in an attempt to find the optimum choice of dependent variable and closure approximations. Using a combination of singular perturbation methods and numerical computations, this report demonstrates: (a) conventional k-e and k-omega sq formulations generally are inaccurate for boundary layers in adverse pressure gradient; (b) using so-called wall functions tends to mask such models' shortcomings; and (c) there exists a more suitable choice of dependent variables which is far more accurate for adverse pressure gradient. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1983
Accession Number
ADA138145

Entities

People

  • D. C. Wilcox

Tags

DTIC Thesaurus Topics

  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Equations Of Motion
  • Experimental Data
  • Flow
  • Fluid Flow
  • Mass Transfer
  • Measurement
  • Pressure Gradients
  • Reynolds Number
  • Roughness
  • Skin Friction
  • Surface Roughness
  • Turbulence
  • Turbulent Flow
  • Turbulent Mixing

Readers

  • Calculus or Mathematical Analysis
  • Computational Modeling and Simulation
  • Fluid Mechanics and Fluid Dynamics.