Atmospheric Modeling: Development of Vortex Structures in Buoyant and Shear Flows

Abstract

Particle-in-cell (PIC) calculations representing a vortex by the particles were done by Rosenhead in 1930 in his study of vortex streets by Birkoff and Fisher in 1959, and by Hama and Burke in 1960. Abernathy and Kronauer made a detailed study of the Karman vortex street in 1962 using the same method. Hockney (1962) was the first one to incorporate the advantages of the fast Fourier transform (FFT) to the PIC method in order to handle very large numbers of particles. Chorin (1973) proposed a new version of the discrete vortex method where vortices are needed only to satisfy the no-slip boundary conditions. The numerical study presented herein combines the concepts of the PIC method, Green's function, and the FFT methods.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1973
Accession Number
ADA010627

Entities

People

  • J. Alex Thomson
  • J. C. S. Meng

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Buoyancy
  • Computational Fluid Dynamics
  • Equations
  • Equations Of Motion
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Geometry
  • Liquids
  • Mechanical Phenomena
  • Mechanical Properties
  • Mechanics
  • Physics Laboratories
  • Shear Flow
  • Turbulence
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Approximation Theory.
  • Fluid Mechanics and Fluid Dynamics.
  • Military History