Turbulence in strongly coupled dusty plasmas using generalized hydrodynamic description

Tiwari, Sanat Kumar; Dharodi, Vikram; Das, Amita; Patel, Bhavesh; Kaw, P. K.

doi:10.1063/1.4913581

Cited by 12 publications

(7 citation statements)

References 23 publications

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“…Our results have inspired other researchers in wider fields beyond plasma physics [64][65][66][67][68][69][70][71][72][73][74][75][76]. The followings are examples.…”

Section: Summary and Subsequent Developmentsupporting

confidence: 68%

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Dynamic Behavior of Dust Particles in Plasmas

Saitou¹,

Ishihara²

2020

Progress in Fine Particle Plasmas

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Experimentally observed dynamic behavior, such as a particle circulation under magnetic field, a bow shock formation in an upper stream of an obstacle, etc., will be reviewed. Dust particles confined in a cylindrical glass tube show a dynamic circulation when strong magnetic field is applied from the bottom of the tube using a permanent magnet. The circulation consists of two kinds of motions: one is a toroidal rotation around the tube axis, and the other is a poloidal rotation. Dust particles are blown upward from near the bottom of the tube against the gravity neighborhood of the tube axis. A two-dimensional supersonic flow of dust particles forms a bow shock in front of a needlelike-shaped obstacle when the flow crosses the obstacle. The slower flow passes the obstacle as a laminar flow. A streamlineshaped void where dust particles are not observed is formed around the obstacle.

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“…Our results have inspired other researchers in wider fields beyond plasma physics [64][65][66][67][68][69][70][71][72][73][74][75][76]. The followings are examples.…”

Section: Summary and Subsequent Developmentsupporting

confidence: 68%

“…The followings are examples. Tiwari et al constructed two-dimensional generalized hydrodynamic model and discussed on turbulence in a strongly coupled plasma [64]. They reported that the turbulence was able to occur at a low Reynolds number if the Weissenberg number was high.…”

Section: Summary and Subsequent Developmentmentioning

confidence: 99%

Dynamic Behavior of Dust Particles in Plasmas

Saitou¹,

Ishihara²

2020

Progress in Fine Particle Plasmas

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“…Therefore, the presence of the charged dust can modify various well-known physical processes in normal (non-dusty) plasmas such as turbulence (Tiwari et al. 2015), wave modes propagation (Kotsarenko, Koshevaya & Kotsarenko 1998; Verheest 2001), electric conductivities in ionospheres (Shebanits et al. 2020) and the Enceladus plume (Yaroshenko & Lühr 2016; Simon et al.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to gravity, drag and radiation pressure, they are highly affected by both the electric and magnetic fields (Horányi 1996;Shukla, Mendis & Chow 1996). Therefore, the presence of the charged dust can modify various well-known physical processes in normal (non-dusty) plasmas such as turbulence (Tiwari et al 2015), wave modes propagation (Kotsarenko, Koshevaya & Kotsarenko 1998;Verheest 2001), electric conductivities in ionospheres (Shebanits et al 2020) and the Enceladus plume (Yaroshenko & Lühr 2016;Simon et al 2011) and ambipolar diffusion (or ambipolar drift) (Amiranashvili & Yu 2002). Ambipolar diffusion is a unique phenomena for plasmas that forms as a direct consequence of charge imbalance caused by the fast motion of the more mobile particles and the tendency of the plasma to remain neutral on spatial scales larger than a Debye length.…”

Section: Introductionmentioning

confidence: 99%

Ambipolar electrostatic field in dusty plasma

Hadid

Shebanits²,

Wahlund³

et al. 2022

J. Plasma Phys.

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We study the effect of negatively charged dust on the magnetic-field-aligned polarisation electrostatic field ( $\boldsymbol {E}_{\parallel }$ ) using Cassini's RPWS/LP in situ measurements during the ‘ring-grazing’ orbits. We derive a general expression for $\boldsymbol {E}_{\parallel }$ and estimate for the first time in situ $\lVert \boldsymbol {E}_{\parallel } \rVert$ (approximately $10^{-5} \, \text {V}\, \text {m}^{-1}$ ) near the Janus and Epimetheus rings. We further demonstrate that the presence of the negatively charged dust close to the ring plane ( $\vert \text {Z} \vert \lesssim 0.11 \, \text {R}_{s}$ ) amplifies $\lVert \boldsymbol {E}_{\parallel } \rVert$ by at least one order of magnitude and reverses its direction due to the effect of the charged dust gravitational and inertial forces. Such reversal confines the electrons at the magnetic equator within the dusty region, around $0.047 \, \text {R}_{s}$ above the ring plane. Furthermore, we discuss the role of the collision terms, in particular the ion–dust drag force, in amplifying $\boldsymbol {E}_{\parallel }$ . These results imply that the charged dust, as small as nanometres in size, can have a significant influence on the plasma transport, in particular ambipolar diffusion along the magnetic field lines, and so their presence must be taken into account when studying such dynamical processes.

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“…Depending on the coupling strength [1], the dusty plasma structure can be treated as a fluid [2, 3], a visco-elastic fluid [4][5][6][7], or a crystal [8][9][10][11]. Variations of the coupling strength lead to phase or structure transitions [12][13][14] and control over the growth of instabilities (gravity driven [15,16] and shear driven [17]), turbulence [18][19][20][21], and wave propagation [22][23][24]), etc. In Earth-based experiments, due to the macroscopic size, the dust particles normally levitate close to the lower electrode, in the plasma sheath, where the gravitational force is balanced by the sheath electric force.…”

Section: Introductionmentioning

confidence: 99%

Ring structural transitions in strongly coupled dusty plasmas

Dharodi¹,

Kostadinova²

2023

Preprint

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This paper presents a numerical study of ring structural transitions in strongly coupled dusty plasma confined in a ring-shaped (quartic) potential well with a central barrier, whose axis of symmetry is parallel to the gravitational attraction. It is observed that increasing the amplitude of the potential leads to a transition from a ring monolayer structure (rings of different diameters nested within the same plane) to a cylindrical shell structure (rings of similar diameter aligned in parallel planes). In the cylindrical shell state, the rings alignment in the vertical plane exhibits hexagonal symmetry. The ring transition is reversible, but exhibits hysteresis in the initial and final particle positions. As the critical conditions for the transitions are approached, the transitional structure states exhibit zigzag instabilities or asymmetries on the ring alignment. Furthermore, for a fixed amplitude of the quartic potential that results in a cylinder-shaped shell structure, we show that additional rings in the cylindrical shell structure can be formed by decreasing the curvature of the parabolic potential well, whose axis of symmetry is perpendicular to the gravitational force, increasing the number density, and lowering the screening parameter. Finally, we discuss the application of these findings to dusty plasma experiments with ring electrodes and weak magnetic fields.

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Turbulence in strongly coupled dusty plasmas using generalized hydrodynamic description

Cited by 12 publications

References 23 publications

Dynamic Behavior of Dust Particles in Plasmas

Dynamic Behavior of Dust Particles in Plasmas

Ambipolar electrostatic field in dusty plasma

Ring structural transitions in strongly coupled dusty plasmas

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