SIMULATION OF DENSE RECOMBINING DIVERTOR PLASMAS WITH A NAVIER-STOKESNEUTRAL TRANSPORT MODES

A two-dimensional combined edge plasma Navier-Stokes neutral transport model is presented for the simulation of dense recombining divertor p lasmas. This model includes ions, electrons, and neutral atoms which u ndergo Coulomb collisions, electron impact ionization, ion-neutral ela stic collisions, three-body and radiative recombination, and neutral-n eutral collisions, The advanced fully implicit solution algorithm is b riefly described and a variety of results on a model geometry are pres ented. It is shown that interesting neutral flow patterns can exist an d that these flows can convect significant energy. A solution that ign ores neutral-neutral collisions is shown to be quantitatively differen t from one that includes neutral-neutral collisions. Solutions are als o shown to be sensitive to the plasma opacity for Lyman alpha radiatio n. (C) 1996 American Institute of Physics.