A two-dimensional MHD global coronal model - Steady-state streamers
Abstract
A 2D, time-dependent, numerical, MHD model for the simulation of coronal streamers from the solar surface to 15 solar is presented. Three examples are given; for dipole, quadrupole and hexapole (Legendre polynomials P1, P2, and P3) initial field topologies. The computed properties are density, temperature, velocity, and magnetic field. The calculation is set up as an initial-boundary value problem wherein a relaxation in time produces the steady state solution. In addition to the properties of the solutions, their accuracy is discussed. Besides solutions for dipole, quadrupole, and hexapole geometries, the model use of realistic values for the density and Alfven speed while still meeting the requirement that the flow speed be super-Alfvenic at the outer boundary by extending the outer boundary to 15 solar radii.
- Publication:
-
Solar Wind Seven Colloquium
- Pub Date:
- 1992
- Bibcode:
- 1992sws..coll..311W
- Keywords:
-
- Magnetic Field Configurations;
- Magnetohydrodynamic Flow;
- Solar Corona;
- Solar Magnetic Field;
- Steady State;
- Two Dimensional Models;
- Boundary Value Problems;
- Legendre Functions;
- Mathematical Models;
- Time Dependence;
- Solar Physics