Propagation of shock structures in inhomogeneous dusty plasmas with dust size distribution and nonadiabatic dust charge fluctuation

Zhang, Liping; Du, Hongmei

doi:10.1007/s12648-019-01538-z

Cited by 3 publications

(3 citation statements)

References 30 publications

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“…The combination of these factors lead to a propagating steady state wave form with the characteristics of an asymmet- ric (steepened) wave form that we observe in the experiments. The increasing profile of shock amplitude is in agreement with past theoretical predictions of Zhang et al 19 . However, the increasing trend of shock thickness (width) with the density inhomogeniety has not been observed or studied earlier.…”

Section: Resultssupporting

confidence: 92%

“…As is well known from theoretical and experimental studies of nonlinear waves like cnoidal waves, solitons etc., the speed of a nonlinear wave depends on its amplitude 12,[33][34][35] . The change in amplitude is inversely proportional to the equilibrium values of both the dust charge and the dust density as discussed in past theoretical studies 19,36,37 . Thus the existence of a density gradient and charge gradient can change the amplitude and thereby change the velocity of the wave.…”

Section: Resultsmentioning

confidence: 57%

“…However, in an experimental situation, the presence of density inhomogeneity is likely to be significant when one performs experiments in a large sized dusty plasma medium. In the literature there exist a very limited number of theoretical works devoted to the study of shock waves propagating in an inhomogeneous plasma medium 18,19 . They show that due to the presence of inhomogeneities in the plasma density, the relationships between amplitude, width and Mach number of shock waves deviate significantly from those obtained in a homogeneous medium.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Excitation of dust acoustic shock waves in an inhomogeneous dusty plasma

Arora,

Bandyopadhyay,

Hariprasad

et al. 2020

Preprint

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An experimental investigation of the propagation characteristics of shock waves in an inhomogeneous dusty plasma is carried out in the Dusty Plasma Experimental (DPEx) device. A homogeneous dusty plasma, made up of poly-dispersive kaolin particles, is initially formed in a DC glow discharge Argon plasma by maintaining a dynamic equilibrium of the pumping speed and the gas feeding rate. Later, an equilibrium density inhomogeneity in the dust fluid is created by introducing an imbalance in the original dynamic equilibrium. Non-linear wave structures are then excited in this inhomogeneous dusty plasma by a sudden compression in the dust fluid. These structures are identified as shock waves and their amplitude and width profiles are measured spatially. The amplitude of a shock structure is seen to increase whereas the width broadens as it propagates down a decreasing dust density profile. A modified-KdV-Burger equation is derived and used to provide a theoretical explanation of the results including the power law scaling of the changes in the amplitude and width as a function of the background density.

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Section: Resultssupporting

confidence: 92%

Section: Resultsmentioning

confidence: 57%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Excitation of dust acoustic shock waves in an inhomogeneous dusty plasma

Arora,

Bandyopadhyay,

Hariprasad

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

Excitation of dust acoustic shock waves in an inhomogeneous dusty plasma

et al. 2020

View full text Add to dashboard Cite

An experimental investigation of the propagation characteristics of shock waves in an inhomogeneous dusty plasma is carried out in the dusty plasma experimental device. A homogeneous dusty plasma, made up of poly-dispersive kaolin particles, is initially formed in a direct current glow discharge argon plasma by maintaining a dynamic equilibrium of the pumping speed and the gas feeding rate. Later, an equilibrium density inhomogeneity in the dust fluid is created by introducing an imbalance in the original dynamic equilibrium. Non-linear wave structures are then excited in this inhomogeneous dusty plasma by a sudden compression in the dust fluid. These structures are identified as shock waves, and their amplitude and width profiles are measured spatially. The amplitude of a shock structure is seen to increase, whereas the width broadens as it propagates down a decreasing dust density profile. A modified-Korteweg–de Vries–Burger equation is derived and used to provide a theoretical explanation of the results, including the power law scaling of the changes in the amplitude and width as a function of the background density.

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Effect of dust size distribution and nonadiabatic charge variation on dispersion relation for linear waves in inhomogeneous complex plasmas

Fu,

Zhang,

Zhang

2024

AIP Advances

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This paper explores linear waves’ instability in nonuniform complex plasmas with dust size distribution and non-adiabatic dust charge fluctuation. For this purpose, the dispersion relation is obtained with the aid of linearizing the hydrodynamic equations governing the properties of linear waves. The contribution of physical parameters such as inhomogeneity, nonadiabatic dust charge fluctuation, and dust size distribution to the features of dust acoustic waves is examined at great length. The numerical results show that the present research results are very important in the phenomenon of space astrophysical and experimental plasmas.

show abstract

Propagation of shock structures in inhomogeneous dusty plasmas with dust size distribution and nonadiabatic dust charge fluctuation

Cited by 3 publications

References 30 publications

Excitation of dust acoustic shock waves in an inhomogeneous dusty plasma

Excitation of dust acoustic shock waves in an inhomogeneous dusty plasma

Excitation of dust acoustic shock waves in an inhomogeneous dusty plasma

Effect of dust size distribution and nonadiabatic charge variation on dispersion relation for linear waves in inhomogeneous complex plasmas

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