2D-modelling of pellet injection in the poloidal plane : results of numerical tests

Paraskevas Lalousis (1)

1 Institute of Electronic Structure and Laser

If the pellet trajectory is restricted to the poloidal plane, and the toroidal expansion dynamics of the ablatant is symmetric with respect to this plane, the three-dimensional pellet-plasma interaction can be approximated by a two-dimensional model formulated for the poloidal plane, provided the expansion of the ablated substance along the magnetic field lines is also taken into account. A time-dependent 2D computational model has been developed in which the complete set of resistive MHD conservation equations, supplemented by Maxwell's equations, are solved for the poloidal plane. The expansion of the ablated substance in the third (toroidal) direction and its mixing with the background plasma is also taken into account. The various components of the code complex are being tested by means of simplified model calculations. In the present paper, results pertaining to the expansion and drift of a high-density plasmoid in a magnetically confined homogeneous background plasma are reported.

Domaines: Physique des plasmas [physics.plasm-ph]

Paraskevas Lalousis. 2D-modelling of pellet injection in the poloidal plane : results of numerical tests. 2004. ⟨hal-00001824⟩