NUMERICAL SIMULATION OF INTERACTION.DYNAMICS OF SHOCK WAVES IN COLLISIONLESS PLASMA

V.A. Vshivkoy, G.I. Dudnikova
VANT. Ser.: Mat. Mod. Fiz. Proc 1997. Вып.1. С. 66.

      The problems of formation and interaction between collisionless shock waves in plasma are important for the outer space processes such as Sun flashes, Supernova fragments dragging by inter-Galaxy medium sun wind flow-over Earth magnetic sphere etc.
      Numerical simulation method was used to study the interaction dynamics bf shock waves resulting from the dragging of dense plasma clouds expanding from one space point with a time delay. The 2-D axisymmetric hybrid plasma model is based on the kinetic description of plasma component and hydrodynamic approximation for electrons. The numerical implementation was accomplished using the particle-in-cell method for the calculation of kinetic Vlasov equation and finite-difference splitting schemes for Maxwell equations. The shock amplitude dependence on initial energy of plasma clouds, parameters of magnetized background delay time is obtained. The conditions are found when the second plasma cloud can expand without perturbation generation in plasma.
      The work was carried out under the auspice of Russian Fundamental Research Foundation (project N 94-01- 00112).