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- W3100642204 abstract "The scope of the present paper is to determine how ion electrostatic wave perturbations in plasma flows are influenced by the presence of a kinematically complex velocity shear. For this purpose we consider a model based on the following set of physical equations: the equation of motion, the continuity equation and the Poisson equation for the electric potential governing the evolution of the system. After linearizing the equations, we solve them numerically. We find out that for a variety of specific values of parameters the system may exhibit quite interesting dynamic behaviour. In particular, we demonstrate that the system exhibits two different kinds of shear flow instabilities: (a)~when the wave vectors evolve exponentially, the ion sound modes become unstable as well; while, (b)~on the other hand, one can find areas in a parametric space where, when the wave vectors vary periodically, the physical system is subject to a strongly pronounced parametric instability. We also show the possibility of the generation of beat wave phenomena, characterized by a noteworthy quasi-periodic temporal behaviour. In the conclusion, we discuss the possible areas of applications and further directions of generalization of the presented work." @default.
- W3100642204 created "2020-11-23" @default.
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- W3100642204 date "2015-04-14" @default.
- W3100642204 modified "2023-10-16" @default.
- W3100642204 title "Electrostatic ion perturbations in kinematically complex shear flows" @default.
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- W3100642204 doi "https://doi.org/10.1088/1367-2630/17/4/043019" @default.
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