Speaker
Description
In recent years, theoretical and numerical studies have been carried out on the excitation of collision-less shocks due to moving charge-density objects in both electron-ion plasma [1] and dusty plasma [2]. However, it is well-established that a dusty plasma can have dust grains of opposite polarity depending on the size of the grains and hence the characteristics of potential shock structures may also differ in such conditions [3].
In this work, we try to explore the possibility of collision-less dust acoustic shocks excited by a charge-density object flowing through a four-component plasma with dust of opposite polarities. We have used a home-grown Flux Corrected Transport (FCT) simulation to study the characteristics and evolution of the shock structures with time in the nonlinear regime, using the density perturbation method. We also study how these structures differ from usual viscous or collisional shocks arising in the same model. Preliminary results from the simulation along with theoretical explanations will be presented.
