We present a new insight into the propagation of ion magnetoacoustic and neutral acoustic waves in magnetic arcade lower solar atmosphere. By means numerical simulations, we aim to: (a) study two-fluid propagating embedded partially-ionized, atmosphere; (b) investigate impact background field configuration on observed wave-periods. consider 2D approximation gravitationally stratified partially-...

The multi-species plasma of natural or laboratory origin is often considered to host nonlinear ion-acoustic waves. We present calculations ion fluxes induced by waves in a consisting multiple populations, electrons, and dust. following models are considered: an electron-ion with cold ions, bi-ion two types warm positively charged dusty plasma. It found that the plasma, wave-induced flux directe...

A new formalism for the derivation of cnoidal wave solution is presented by introducing a set initial conditions and subacoustic moving frame. The resulting solutions also constructed in way that ensures conservation number density. are illustrated variety graphical representations, effect amplitude's magnitude on form presented. Interestingly, it shown wavelength decreases with amplitude. In a...

in the current paper, we have studied the effect of dark energy on for-mation where dark energy exists in the background. for this purpose, we used both wmap9 and planck data to study how the radius changes with redshift in these mod-els. we used different data sets to fix the cosmological parameters to obtain a solution for a spherical region under collapse. the mechanism of structure formation f...

An acoustic instability of a shock precursor driven by the pressure gradient of accelerated particles is studied in the nonlinear regime. The nonlinearity steepens unstable acoustic waves and turns them into shocks. The shocks form a “shocktrain” but they may merge into each other. Traveling wave solutions are obtained analytically in two different cases. In the first case, only acoustic instab...

Dust acoustic (or dust density) waves have been observed in many laboratory dusty plasmas. These low-frequency waves involve the dynamics of highly charged and massive dust grains, and can be excited by the flow of ions relative to dust. In this paper, we consider the nonlinear development of the dust acoustic instability, excited by thermal ion flow, in a collisional plasma containing dust wit...

EEG signals are records of nonlinear solitary waves in human brains. The waves have several types (e.g., α, β, γ, θ, δ) in response to different levels of consciousness. They are classified into two groups: Group-1 consists of complex storm-like waves (α, β, and γ); Group-2 is composed of simple quasilinear waves (θ and δ). In order to elucidate the mechanism of EEG wave formation and propagati...