The Riemann problem for the main model cases of the Euler-Poisson equations

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Abstract

In this paper, we construct a solution to the Riemann problem for an inhomogeneous nonstrictly hyperbolic system of two equations, which is a corollary of the Euler-Poisson equations without pressure [9]. These equations can be considered for the cases of attractive and repulsive forces as well as for the cases of zero and nonzero underlying density background. The solution to the Riemann problem for each case is nonstandard and contains a delta-shaped singularity in the density component. In [16], solutions were constructed for the combination corresponding to the cold plasma model (repulsive force and nonzero background density). In this paper, we consider the three remaining cases.

About the authors

L. V. Gargyants

Bauman Moscow State Technical University

Author for correspondence.
Email: gargyants@bmstu.ru
Moscow, Russia

O. S. Rozanova

Lomonosov Moscow State University

Email: rozanova@mech.math.msu.su
Moscow, Russia

M. K. Turzynsky

Russian University of Transport; National Research University “Higher School of Economics” (HSE University)

Email: M13041@yandex.ru
Moscow, Russia

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Copyright (c) 2024 Gargyants L.V., Rozanova O.S., Turzynsky M.K.

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