Roles of positively charged dust, ion fluid temperature, and nonthermal electrons in the formation of modified-ion-acoustic solitary and shock waves

Shikha, R.K.; Orani, M. M.; Mamun, A. A.

doi:10.1016/j.rinp.2021.104507

Cited by 5 publications

(3 citation statements)

References 27 publications

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“…Now, we would like to observe the basic properties of DIASHWs in a magnetized PIP having inertial pair-ions, inertialess non-thermal distributed electrons and positrons, and static negatively charged massive dust grains by changing the various plasma parameters, viz., ion kinematic viscosity, oblique angle, non-thermality of electrons and positrons, mass, charge, and number density of the plasma species. Note that the viscous force acting in positive and negative ion fluid of the plasma model under consideration is the source of dissipation, and is responsible for the formation of shock structures [50]. It can be seen from the literature that the PIP system can support these conditions: [17,18,55]), and m 2 < m 1 (i.e., Ar + − F − [10,13]).…”

Section: Numerical Analysis and Discussionmentioning

confidence: 99%

“…It is well established that the ion fluids are viscous, and in realistic situations, ion fluids which occur in both space [50] and laboratory [50,51] plasmas, where the effect of viscous force cannot be neglected. It is important to note here that Burger's equation, defined by Equation (38), is derived for our multi-ion dusty plasma system, when the effect of dispersion is negligible compared to that of dissipation.…”

Section: Derivation Of Burgers' Equationmentioning

confidence: 99%

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Electrostatic Shock Structures in a Magnetized Plasma Having Non-Thermal Particles

Jahan

Banik

Chowdhury

et al. 2022

Gases

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A rigorous theoretical investigation has been made on the nonlinear propagation of dust-ion-acoustic shock waves in a multi-component magnetized pair-ion plasma (PIP) having inertial warm positive and negative ions, inertialess non-thermal electrons and positrons, and static negatively charged massive dust grains. The Burgers’ equation is derived by employing the reductive perturbation method. The plasma model supports both positive and negative shock structures in the presence of static negatively charged massive dust grains. It is found that the steepness of both positive and negative shock profiles declines with the increase of ion kinematic viscosity without affecting the height, and the increment of negative (positive) ion mass in the PIP system declines (enhances) the amplitude of the shock profile. It is also observed that the increase in oblique angle raises the height of the positive shock profile, and the height of the positive shock wave increases with the number density of positron. The applications of the findings from the present investigation are briefly discussed.

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Section: Numerical Analysis and Discussionmentioning

confidence: 99%

Section: Derivation Of Burgers' Equationmentioning

confidence: 99%

Electrostatic Shock Structures in a Magnetized Plasma Having Non-Thermal Particles

Jahan

Banik

Chowdhury

et al. 2022

Gases

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“…Mamun et al [ 58 ] discussed the variation of amplitude of DIA shock wave formed in a multi‐ion plasma. Recently, Shikha et al [ 59 ] have studied modified IA solitary and shock waves in warm, nonthermal unmagnetized plasma containing PCD. Mushinzimana [ 60 ] used pseudopotential approach to observe the properties of DIA solitary waves in plasmas with adiabatic PCD, adiabatic ions and found that solitons of both polarities coexist for a range of some plasma parameters.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear ion‐acoustic waves in magnetized plasmas in presence of energetic electrons and positively charged dust

Orani

Akter

Mamun

2022

Contributions to Plasma Physics

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A theoretical investigation has been carried out for exploring different features of ion-acoustic solitary and shock waves in a three-component magnetized plasma containing a mixture of thermal and nonthermal (energetic) inertialess electrons, warm inertial ions, and positively charged stationary dust particles. The standard Korteweg-de Vries (Burgers) equation has been derived by employing the reductive perturbation method, and its solitary (shock) wave solution has been derived and examined analytically as well as numerically. The latter exhibits characteristic properties (amplitude, width, speed, and polarity) of the ion-acoustic solitary and shock waves. It has been shown that the ion-acoustic solitary and shock waves are significantly modified by different plasma parameters (viz. parameter measuring the ratio of dust charge density to ion charge density, parameter measuring the fraction of energetic electrons, parameter measuring ion or electron temperature, and the external magnetic field). The present investigation may help in understanding the physics of various nonlinear phenomena formed in many space plasma systems, (viz. earth's mesosphere, solar wind, and cometary tails) and laboratory devices (laboratory experiments

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Dust ion acoustic solitons and double layers in a dusty plasma with adiabatic positive dust, adiabatic positive ion species, and Cairns-distributed electrons

et al. 2022

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The propagation of dust ion acoustic solitary waves and double layers is studied in a dusty plasma with heavy adiabatic positively charged dust grains and lighter adiabatic positive ions with Cairns-distributed electrons using the arbitrary amplitude Sagdeev pseudopotential approach. The analysis of the Sagdeev pseudopotential shows that this plasma model supports the propagation of positive solitons limited by the occurrence of the ion sonic point and negative solitons limited by the occurrence of double layers. Solitons of both polarities coexist for a range of some plasma parameters. We have shown that at a critical dust-to-ion density ratio, f, at which the third derivative of the Sagdeev pseudopotential vanishes, positive and negative solitons coexist without a soliton with finite amplitude at the acoustic speed, contrary to an earlier study. This suggests that the existence of a soliton with finite amplitude at the acoustic speed is not always a pre-requisite for the coexistence of nonlinear structures of both polarities. Positive and negative solitons coexist when the electrons are strongly nonthermal, with moderate ion thermal effects. Increasing ion thermal effect shifts the coexistence region to lower values of f, and when the ion thermal effects become important, negative solitons disappear and only positive solitons survive. The effects of different plasma parameters on the characteristics of the nonlinear structures have also been discussed in detail.

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Roles of positively charged dust, ion fluid temperature, and nonthermal electrons in the formation of modified-ion-acoustic solitary and shock waves

Cited by 5 publications

References 27 publications

Electrostatic Shock Structures in a Magnetized Plasma Having Non-Thermal Particles

Electrostatic Shock Structures in a Magnetized Plasma Having Non-Thermal Particles

Nonlinear ion‐acoustic waves in magnetized plasmas in presence of energetic electrons and positively charged dust

Dust ion acoustic solitons and double layers in a dusty plasma with adiabatic positive dust, adiabatic positive ion species, and Cairns-distributed electrons

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