Global Two-Scalar Velocimetry and Development of Low-Order Models for Use in Optical-Phase Correction in a Plane Mixing Layer

Abstract

Work was conducted on two projects related to control of shear flows. In the first, two-dimensional simulations were performed to study the effects of resolution on the extraction of velocity data from measurements of scalar fields in incompressible flows. That work demonstrates "proof-of concept" for the methodology described in earlier work supported by AFOSR. In the second, we developed a general-purpose algorithm for computing all solutions of an arbitrary system of multivariate polynomial equations. That work constitutes the basis of a technique for determining the coefficients in low-order models of scalar transport in turbulent shear flows. The polynomial root-finder has been applied to con construction of low-order models of scalar transport in a turbulent plane mixing layer.

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Document Details

Document Type
Technical Report
Publication Date
Mar 04, 2000
Accession Number
ADA376026

Entities

People

  • Arne J. Pearlstein

Organizations

  • University of Illinois Urbana–Champaign

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Space

DTIC Thesaurus Topics

  • Algorithms
  • Boltzmann Equation
  • Computational Fluid Dynamics
  • Computational Science
  • Differential Equations
  • Electronic Mail
  • Equations
  • Flow
  • Fluid Dynamics
  • Fluid Mechanics
  • Geometry
  • Mechanics
  • Noise
  • Physics
  • Shear Flow
  • Simulations
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Calculus or Mathematical Analysis
  • Fluid Mechanics and Fluid Dynamics.
  • Software Engineering