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The paper is devoted to the numerical study of solutions to the Vlasov-Poisson-Landau kinetic equations for distribution functions with typical lengthsuch that, wherestands for the Debye radius. It is also assumed that the Knudsen number, wheredenotes the mean free path of electrons. We use the standard model of plasma of electrons with a spatially homogeneous neutralizing background of motionless heavy ions. We study numerically the one-dimensional (1D) in space kinetic equation with the two-dimensional in velocity space (in three-dimensional spherical coordinates with axial symmetry) Landau collisional operator for smalland different. The numerical results are presented and compared with appropriate solutions obtained earlier for the simplifiedBGK model. The results confirm numerically the existence of high-frequency oscillations of the electric field, which slowly decline due to collisions.

Numerical Study of the Influence of Collisions on Oscillations of the Electric Field for the Vlasov-Poisson-Landau Kinetic Equation