Nonplanar ion-acoustic subsonic shock waves in dissipative electron-ion-pcd plasmas

A A Mamun,B E Sharmin

doi:10.1063/5.0031171

Abstract

The dissipative electron-ion-pcd (positively charged dust) plasma, which is observed in both space and laboratory plasmas, is considered. The basic features of nonplanar cylindrical and spherical ion-acoustic subsonic shock waves in such a medium are investigated by deriving a modified Burgers equation using the reductive perturbation method. It is found that the stationary pcd species reduces the phase speed of the ion-acoustic waves and, consequently, supports the subsonic shock waves due to the kinematic viscosity (acting as a source of dissipation) of the ion species. It is observed that the cylindrical and spherical subsonic shock waves evolve with time very significantly and that the time evolution of the spherical shock structures is faster than that of the cylindrical ones. The implications of the results of this work to space and laboratory plasmas are discussed.

Highlights

● the secondary emission of electrons from the dust surface by the impact of high energetic plasma particles like electrons and ions
Μ ≫ 1 is not appropriate for most of the electron-ion-pcd plasma since the modified IA (MIA) waves occur due to compression and rarefaction and vise-versa of the ion species in presence of the pcd species. ● The relation (1) for the short-wavelength limit is ωpi, which is the upper limit of the MIA or IA waves since it is independent of μ
The aim of our present work is to examine the effects of stationary pcd species and of the new features of linear MIA waves on MIA shock waves (SWs) in the electron-ion-pcd plasma system under consideration

Summary

Introduction

● the secondary emission of electrons from the dust surface by the impact of high energetic plasma particles like electrons and ions.50. The dispersion relation for modified IA (MIA) waves in an electron-ion-pcd plasma medium (containing inertialess isothermal electron species, inertial cold ion species, and stationary pcd species) is given by

Objectives

Results

Conclusion