Quasineutral limit of the two-fluid Euler-Poisson system in a bounded domain of R3

The quasineutral limit of the two-fluid Euler-Poisson system (one for ions and another for electrons) in a bounded domain of R3 is rigorously proved by investigating the existence and the stability of boundary layers. The non-penetration boundary condition for velocities and Dirichlet boundary condition for electric potential are considered.