A New Eddy-Based Model for Wall-Bounded Turbulent Flows

Abstract

We have completed preliminary work to develop a new model for turbulent wall-bounded flows that captures the correct scaling behavior of the turbulence intensities and other near-wall statistics (including skin friction) for a wide range of Reynolds numbers. Such information can be used for prediction purposes and may be the basis of a new approach to the near-wall model problem in Large Eddy Simulation (LES). The model is based on our new understanding of turbulent structure in subsonic, supersonic and hypersonic flows. We use the concept of the attached eddy hypothesis to map the attributes of each eddy type in physical space to wavenumber space. Experimental data are then used to determine the scaling behavior of the basic eddy motions in wavenumber space, and the scaling behavior of the Reynolds stress behavior is recovered by integrating over all wavenumbers.

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Document Details

Document Type
Technical Report
Publication Date
Sep 09, 2010
Accession Number
ADA566202

Entities

People

  • Alexander Smits

Organizations

  • Princeton University

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Boundary Layer Flow
  • Channel Flow
  • Computational Fluid Dynamics
  • Equations
  • Fluid Dynamics
  • Fluid Mechanics
  • Gaussian Distributions
  • Geometry
  • Mechanical Properties
  • Pipe Flow
  • Pressure Gradients
  • Reynolds Number
  • Shear Stresses
  • Turbulent Boundary Layer
  • Turbulent Flow
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Theoretical Analysis.

Technology Areas

  • Hypersonics
  • Space
  • Space - Hall-Effect Thruster