An opposite polarity dusty plasma system (containing inertial positive as well negative dust species and inertialess singly charged ion species) is considered. The nature of the electrostatic self-gravitational potential structures (associated with dust-acoustic waves) identified by numerical analysis two coupled second-order nonlinear differential equations. latter are Poisson’s equations for ...

In the Kundt’s experiment of acoustic resonance in closed tubes, two characteristic lengths were observed: one is wave-length sound waves and other scale dust striation. The latter has remained unresolved for its formation mechanism. Based on Fluid Gauge Theory proposed recently by author, mechanism striation studied. When weak enough, unobserved. Once wave intensity exceeds a threshold value, ...

A dusty plasma system containing Boltzmann-distributed electrons, non-thermal ions, and mobile charge fluctuating negative dust has been considered. The nonlinear propagation of the dust-acoustic (DA) waves in such a dusty plasma has been investigated by employing the reductive perturbation method. It has been found that the dust charge fluctuation is a source of dissipation, and is responsible...

An experimental investigation of dust acoustic ~DA! waves in a dc glow discharge plasma is described. The glow discharge is formed between a 3 cm anode disk and the grounded walls of a 60 cm diameter vacuum chamber which is filled with nitrogen gas at a pressure of about 100 mTorr. Dust located on a tray in the chamber is attracted into the plasma where it is trapped electrostatically. The dust...

There are in the literature several theories to explain the mass loss in stellar winds. In particular, for late-type stars, some authors have proposed a wind model driven by an outward-directed flux of damped Alfvén waves. The winds of these stars present great amounts of dust particles that, if charged, can give rise to new wave modes or modify the pre-existing ones. In this work, we study how...

We use molecular dynamics (MD) and particle-in-cell (PIC) simulation methods to investigate the dispersion relation of dust-acoustic waves in a one-dimensional, strongly coupled (Coulomb coupling parameter = r = ratio of the Coulomb energy to the thermal energy = 120) dusty plasma. We study both cases where the dust is represented by a small number of simulation particles that form into a regul...