Investigation of dust ion acoustic shock and solitary waves in a viscous dusty plasma

Abstract

A viscous dusty plasma containing Kappa-(κ−) distributed electrons,positive warm viscous ions and constant negatively charged dust grains with viscosity have been considered to study the modes of dust-ion-acoustic waves (DIAWs) theoretically and numerically. The derivations and basic features of shock and solitary waves with different plasma parameters like Mach number, finite temperature coefficient, unperturbed dust streaming velocity, kinematic viscosity of dust etc. of this DIAWs mode have been performed. Considering the dynamical equation from Korteweg–de Vries(KdV) equation, a phase portrait has been drawn and the position of saddle point or col. and center have also been discussed. This type of dusty plasma can be found in celestial bodies. The results of this research work can be applied to study the properties of DIAWs in various astrophysical situation where κ-distributive electrons are present and careful modification of the same model can help us to understand the nature of the DIAWs of laboratory plasma as well.

Charge fluctuations on the dust grains in the presence of energetic electrons

“…Furthermore, many authors [21,22] have neglected dust charge fluctuations since the dust charging time scale is often observed to be longer as compared to the DIA and Dust Acoustic (DA) time scales. However, dust charge fluctuation is an important aspect of dusty plasma that depends on the ambient plasma parameters significantly [23].Therefore, a better understanding of charge fluctuations becomes essential, especially in the context of multiple electron populations. The present study emphasizes the role of the hot electron population in such a dust charging process.…”

Nonlinear interaction of electromagnetic wave with electron acoustic wave in plasma

“…Multi-component plasma as a medium can support a variety of waves and instabilities [1]. Hence, it is often very interesting to study the nonlinear interaction of waves through plasma as it may change plasma behaviour giving rise to new phenomena.…”

“…A one-dimensional kinetic simulation has shown the generation of partial electric fields due to coupling in the transition region of ionosphere and magnetosphere between Kinetic Alfven Waves and Modified Electron Acoustic Waves [17]. Moreover different kinds of low-frequency waves like ion acoustic waves, dust acoustic waves, and dust ion acoustic waves have already been investigated by many scientists [1,[18][19][20][21]. One very interesting study by Morozova and Popel has described that dust acoustic waves are generated by the meteoric body and radio waves emitted by the meteor lead to a modulation instability in electromagnetic waves [22].…”

Dust-ion-acoustic shock waves in the presence of (r, q) distributed electrons

“…In last few decades, dusty (or complex) plasmas-due to its ubiquitous nature-have attracted the attention of the scientific community. Such plasmas are found in laboratory [1][2][3][4] as well as in space environments [5][6][7][8]. Thomas and co-workers' [5] discovery of dusty plasma crystals greatly advanced the research in this field.…”