Numerical Simulation of Three-Dimensional Self-Gravitating Flow

Abstract

The three-dimensional flow of a self-gravitating fluid is numerically simulated using a Fourier pseudospectral method with a logarithmic variable formulation. Two cases with zero total angular momentum are studied in detail, a 323 simulation (Run B). Other than the grid size, the primary difference between the two cases are that Run A modelled atomic hydrogen and had considerably more compressible motion initially than Run B, which modelled molecular hydrogen. The numerical results indicate that gravitational collapse can proceed in a variety of ways. In the Run A, collapse led to an elongated tube-like structure, while in the Run B, collapse led to a flatter, disklike structure. Self-gravitating flow, Polytrope, Spectral method.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1993
Accession Number
ADA272972

Entities

People

  • John V. Shebalin

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Angular Momentum
  • Collapse
  • Computers
  • Energy
  • Engineering
  • Equations
  • Flow
  • Fluid Mechanics
  • Hydrogen
  • Kinetic Energy
  • Mechanical Phenomena
  • Mechanics
  • Momentum
  • Simulations
  • Thermal Conductivity
  • Three Dimensional
  • Total Angular Momentum

Fields of Study

  • Physics

Readers

  • Control Systems Engineering.
  • Fluid Dynamics.
  • Operations Research