Abstract
Motion of a dihedral piston one of whose faces moves into while the other pulls out from the initially quiescent perfect gas is considered. The problem is investigated analytically in the linearized self-similar formulation, and numerically in totally nonlinearized formulation. Analytic form of the basic shock wave is obtained on the assumption that the velocity of the moving-in face is small in comparison with the speed of sound. The method of finite differences is applied to different velocities of piston faces. The pattern of arising flows is investigated.
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