Characteristics of dust voids in a strongly coupled laboratory dusty plasma

Bailung, Yoshiko; Deka, T.; Boruah, A.; Sharma, S. K.; Pal, Arup R.; Chutia, Joyanti; Bailung, Heremba

doi:10.1063/1.5029338

Cited by 11 publications

(4 citation statements)

References 37 publications

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“…The obstacle used in dusty plasma flow experiments is actually a dust void. A void is a dust-free region, which is encountered spontaneously in certain experimental conditions or can be produced externally also [23][24][25][26][27][28]. In the past couple of decades, there have been a few studies on the interaction of a dusty plasma medium with dust voids.…”

Section: Obstacle In Dusty Plasma Flowsmentioning

confidence: 99%

Vortex Dynamics in Dusty Plasma Flow Past a Dust Void

Bailung¹,

Bailung²

2022

Vortex Dynamics - From Physical to Mathematical Aspects

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The beauty in the formation of vortices during flow around obstacles in fluid mechanics has fascinated mankind since ages. To beat the curiosity behind such an interesting phenomenon, researchers have been constantly investigating the underlying physics and its application in various areas of science. Examining the behavior of the flow and pattern formations behind an obstacle renders a suitable platform to realize the transition from laminar to turbulence. A dusty plasma system comprising of micron-sized particles acts as a unique and versatile medium to investigate such flow behavior at the most kinetic level. In this perspective, this chapter provides a brief discussion on the fundamentals of dusty plasma and its characteristics. Adding to this, a discussion on the generation of a dusty plasma medium is provided. Then, a unique model of inducing a dusty plasma flow past an obstacle at different velocities, producing counter-rotating symmetric vortices, is discussed. The obstacle in the experiment is a dust void, which is a static structure in a dusty plasma medium. Its generation mechanism is also discussed in the chapter.

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Section: Obstacle In Dusty Plasma Flowsmentioning

confidence: 99%

Vortex Dynamics in Dusty Plasma Flow Past a Dust Void

Bailung¹,

Bailung²

2022

Vortex Dynamics - From Physical to Mathematical Aspects

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“…The dusty plasma can be described by the fluid model [21,22] or the visco-elastic fluid model [23,24] according to the magnitude of the Coulomb coupling strength. The strongly coupling effects can cause ring structural transition [25] and the formation of a void [26]. A pair of counter-rotating symmetric vortices was observed in the wake in a flowing dusty plasma, where the strongly coupled dusty plasmas flow with controllable velocity [27].…”

Section: Introductionmentioning

confidence: 99%

The combined effects of quantum and strong coupling on the nonlinear collective excitation in quantum dusty plasmas

Li,

Kang,

Wang

2024

Commun. Theor. Phys.

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The quantum hydrodynamic model for electrons and ions and the generalized hydrodynamic model for the strongly coupled dust particles are proposed in the strongly coupled quantum dusty plasma, where the combined quantum effects of quantum diffraction, quantum statistic pressure, as well as electron exchange and correlation effects are all considered in the quantum hydrodynamic model. The shear and bulk viscosity effects are include in the viscoelastic relaxation, which leads to the decay of the dust-ion-acoustic waves. The approximate time-dependent solitary solution is obtained by the momentum conservation law in the presence of viscosity.

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“…In the laboratory discharge plasma, dust grain floats with negative potential to maintain equilibrium between ion and electron fluxes onto the dust so that the surface current is zero. When the dust particle density in plasma is sufficiently high, Coulomb interaction between the dust particles dominates and the dusty plasma can support a variety of linear and nonlinear phenomena such as strong coupling effects, dust crystallization, low-frequency wave modes, instabilities, voids, vortex, solitary structures, etc [6,[11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Suppression of a spontaneous dust density wave by modulation of ion streaming

Deka

Chutia

Bailung

et al. 2020

Plasma Sci. Technol.

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Synchronization of a self-excited dust density wave has been experimentally investigated in a strongly coupled dusty plasma. A dust density wave of frequency ∼78 Hz is spontaneously generated from the dust void boundary due to the ion streaming instability. The electric field in the dust void region is measured, and the electric field force and ion drag force on the dust particles at the void boundary are estimated to explain the mechanism of spontaneous dust density wave excitation. Synchronization occurring through the suppression mechanism is observed by modulating the ion streaming by applying an external sinusoidal signal to the dust void. At sufficiently high modulation amplitude, the onset of period-doubling bifurcation is observed. Fast Fourier transform spectral analysis is done using time-series data obtained from high-speed video imaging. The van der Pol equation with a force term is used to correlate the observed suppression phenomena.

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Characteristics of dust voids in a strongly coupled laboratory dusty plasma

Cited by 11 publications

References 37 publications

Vortex Dynamics in Dusty Plasma Flow Past a Dust Void

Vortex Dynamics in Dusty Plasma Flow Past a Dust Void

The combined effects of quantum and strong coupling on the nonlinear collective excitation in quantum dusty plasmas

Suppression of a spontaneous dust density wave by modulation of ion streaming

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