Solution of threefluid model equations with anomalous transport coefficients for the quiet solar wind.
Abstract
A threefluid model consisting of continuity, momentum, and energy equations is used to describe the average behavior of the electrons, protons, and alphaparticles in the quiet expanding solar corona. Friction forces due to the possible occurrence of different particle streaming velocities are incorporated in the model equations. The transport coefficients are allowed to include phenomenological contributions from turbulent waveparticle interactions existing in the solar wind. The model assumes spherical symmetry and neglects such effects as viscosity, rotation, and magnetic fields. The numerical solution of the equations is achieved by using a perturbationmethod procedure in which a twofluid solution for electrons and protons is followed by a solution for the alpha particles. These modelequations predict the following features of the alphaparticles at 1 AU: (1) equal alphaparticle and proton streaming velocities, (2) an alphaparticle to proton temperature ratio of about 3.5, and (3) an alphaparticle to proton density ratio of about 0.035.
 Publication:

The Astrophysical Journal
 Pub Date:
 February 1975
 DOI:
 10.1086/153406
 Bibcode:
 1975ApJ...196..205C
 Keywords:

 Astronomical Models;
 Mathematical Models;
 Multiphase Flow;
 Solar Wind;
 Transport Properties;
 Alpha Particles;
 Dynamic Models;
 Friction;
 Heat Transfer;
 Interplanetary Magnetic Fields;
 Perturbation Theory;
 Solar Corona;
 Solar Electrons;
 Solar Protons;
 Solar Wind Velocity;
 Solar Physics