A Predictor-Corrector Technique for Visualizing Unsteady Flow.

Abstract

We present a method for visualizing unsteady flow by displaying its vortices. The vortices are identified by using a vorticity-predictor pressure-corrector scheme that follows vortex cores. The cross-sections of a vortex at each point along the core can be represented by a Fourier series. A vortex can be faithfully reconstructed from the series as a simple quadrilateral mesh, or its reconstruction can be enhanced to indicate helical motion. The mesh can reduce the representation of the flow features by a factor of one thousand or more compared with the volumetric dataset. With this amount of reduction it is possible to implement an interactive system on a graphics workstation to permit a viewer to examine, in three dimensions, the evolution of the vortical structures in a complex, unsteady flow. (AN)

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1995
Accession Number
ADA299235

Entities

People

  • Bart A. Singer
  • David C. Banks

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Computational Fluid Dynamics
  • Computers
  • Data Sets
  • Flow
  • Flow Fields
  • Fluid Dynamics
  • Fluid Flow
  • Fourier Series
  • Geometry
  • Graphics
  • Pressure Gradients
  • Shear Flow
  • Three Dimensional
  • Turbulent Flow
  • Turbulent Mixing
  • Unsteady Flow

Fields of Study

  • Physics

Readers

  • Computer Vision.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Fluid Mechanics and Fluid Dynamics.