An Implicit, Conservative Multi-Temperature MHD Algorithm

Abstract

A novel algorithm to accurately simulate realistic plasmas with constituent species at multiple temperatures using an extended MHD model was developed. The algorithm was based on a ROE-type approximate Riemann solver. The algorithm was implemented in a code to model the time-dependent, three-dimensional, arbitrary-geometry MHD model which includes viscous and resistive effects. The code was extended to include thermal diffusion for the constituent temperatures (neutrals, ions, and electrons). A time-dependent ionization model was added which self-consistently calculates the ionization fraction of the fluid. Energy loss mechanisms were added for the constituent fluid components. The algorithm was implemented on parallel supercomputers to allow the detailed modeling of realistic plasmas in complex three-dimensional geometries.

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Document Details

Document Type
Technical Report
Publication Date
May 25, 2000
Accession Number
ADA390775

Entities

People

  • Uri Shumlak

Organizations

  • University of Washington

Tags

Communities of Interest

  • Counter WMD
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Algorithms
  • Computers
  • Conduction (Heat Transfer)
  • Diffusion
  • Electrons
  • Energy Transfer
  • Equations
  • Geometry
  • Ionization
  • Magnetic Fields
  • Military Research
  • Supercomputers
  • Thermal Diffusion
  • Three Dimensional
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Computational Fluid Dynamics (CFD)
  • Plasma Physics.

Technology Areas

  • Microelectronics