DIRECT-INTERACTION APPROXIMATION FOR SHEAR AND THERMALLY-DRIVEN TURBULENCE,

Abstract

The direct-interaction approximation for turbulence is extended to shear flows and Boussinesq convection contained in regions of arbitrary size and shape. It is pointed out that the approximation provides a consistent generalization of mixing-length concepts which continues to be applicable when the scale of inhomogeneity is comparable to the effective mixing length. The degree of faithfulness to be expected of the approximation is discussed on the basis of inferences from numerical results on isotropic turbulence. (Author)

Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1963
Accession Number
AD0425745

Entities

People

  • Robert H. Kraichnan

Organizations

  • New York University

Tags

DTIC Thesaurus Topics

  • Convection
  • Flow
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Shear Flow
  • Turbulence

Fields of Study

  • Physics

Readers

  • Applied Combinatorial Optimization and Logic Circuit Design.
  • Fluid Dynamics.
  • Ocean-Atmosphere Mesoscale Modeling, Data Assimilation, and Flux Boundary Layers

Technology Areas

  • AI & ML
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