Evolution and Merger of Isolated Vortex Structures.

Abstract

We present numerical simulations of the instability, merger, and breaking of two piecewise-constant finite-area-vortex-regions (FAVR's). We use and improved contour dynamical algorithms with node insertion-and-removal to maintain the a priori accuracy. We observe that corotating 'V-states' (symmtric steady-state (FAVR's) are unstable when properly perturbed if their centroid effective radius, x/R, is less than 1.6, thereby verifying an estimate of Saffman and Szeto. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1981
Accession Number
ADA112670

Entities

People

  • Edward A. Overman Ii
  • Norman J. Zabusky

Organizations

  • University of Pittsburgh

Tags

Communities of Interest

  • C4I
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Algorithms
  • Aspect Ratio
  • Computational Science
  • Computations
  • Equations
  • Euler Equations
  • Fluid Dynamics
  • Geometry
  • Integral Equations
  • Integrals
  • Mathematics
  • Reynolds Number
  • Simulations
  • Steady State
  • Truncation
  • Turbulent Mixing
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Computational Modeling and Simulation
  • Fluid Dynamics.
  • Military Logistics and Supply Chain Management