Developing Turbulent Flow in a 180 Degree Bend and Downstream Tangent of Square Cross-Sections.

Abstract

A detailed account is given of the experimental and numerical modeling activities for the research period, relating to turbulent flow in a 180 deg curved duct. The measurements show variations in the flow field which, while understood, are not predictable by a K-epsilon model of turbulence. Numerical diffusion and exaggerated physical diffusion in the turbulence model are believed to be the major causes for the discrepancies observed. The new experimental data offered here should be of value for extending the theoretical base for the improved understanding and modeling of 3-D turbulent flows. Recommendations are made for continuing work.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1982
Accession Number
ADA120613

Entities

People

  • A. Modavi
  • J. A. C. Humphrey
  • S. M. Chang

Organizations

  • University of California, Berkeley

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Accuracy
  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Computer Programs
  • Flow Fields
  • Fluid Dynamics
  • Fluid Flow
  • Hydrodynamics
  • Inviscid Flow
  • Laminar Flow
  • Measurement
  • Secondary Flow
  • Shear Stresses
  • Three Dimensional
  • Turbulent Flow
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Theoretical Analysis.