Basic Studies in Turbulent Shear Flows. End of the Fiscal-Year Summary Report for 1994.

Abstract

The goal of this research is to understand the underlying physics of turbulence phenomena through coherent structures (CS). The aim is not only to understand the flow physics but also to devise methods for turbulence prediction and control. Our approach utilizes experiment, numerics and theory to understand both CS dynamics and structure. CS are studied in two ways: (i) long- time, global dynamics using experimental data and dynamical systems theory and (ii) crucial, localized CS interactions understood via vorticity dynamics. Below, we have summarized results in several key areas: (i) global dynamics in a forced plane mixing layer (ii) ODE models for spatially developing free shear flows, (iii) core dynamics and transition in a plane mixing layer, (iv) vorticity and helicity statistics in a circular jet, (v) new approaches to identifying sources of jet noise, and (vi) the kinematic separation of homogeneous mixtures.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1994
Accession Number
ADA289145

Entities

People

  • Fazle Hussain

Organizations

  • University of Houston

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Boundary Layer
  • Computational Fluid Dynamics
  • Convection
  • Differential Equations
  • Equations
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Frequency
  • Measurement
  • Mechanical Engineering
  • Mechanics
  • Nonlinear Dynamics
  • Shear Flow
  • Three Dimensional
  • Turbulent Flow
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.