Bow Shock Formation in a Complex Plasma

Saitou, Yoshifumi; Nakamura, Yoshiharu; Kamimura, Tomohiko; Ishihara, Osamu

doi:10.1103/physrevlett.108.065004

Cited by 51 publications

(42 citation statements)

References 24 publications

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“…Also, this isotropic potential is well suited for fundamental analytical and numerical investigations on cooperative effects such as self-organized structure formation [3,12], collective dynamical processes [13][14][15], spectral properties [16,17] or the melting behavior [18,19] in strongly correlated (screened) Coulomb systems. The multi-component and non-equilibrium nature of a complex plasma requires, however, a careful analysis of plasma streaming and dynamical grain charging effects, 3 which were experimentally shown to become of utmost importance at least near the plasma sheath; see, for example, [20][21][22][23][24][25]. In a plasma with ions streaming at a uniform velocity, the dust potential becomes (strongly) anisotropic and takes the form of an oscillatory wake structure in the downstream direction, which was the subject of various analytical and numerical studies, e.g.…”

Section: Introductionmentioning

confidence: 99%

On the wake structure in streaming complex plasmas

et al. 2012

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The theoretical description of complex (dusty) plasmas requires multiscale concepts that adequately incorporate the correlated interplay of streaming electrons and ions, neutrals and dust grains. Knowing the effective dust-dust interaction, the multiscale problem can be effectively reduced to a one-component plasma model of the dust subsystem. The goal of this paper is a systematic evaluation of the electrostatic potential distribution around a dust grain in the presence of a streaming plasma environment by means of two complementary approaches: (i) a high-precision computation of the dynamically screened Coulomb potential from the dynamic dielectric function and (ii) full 3D particle-in-cell simulations, which self-consistently include dynamical grain charging and nonlinear effects. The range of applicability of these two approaches is addressed.

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Section: Introductionmentioning

confidence: 99%

On the wake structure in streaming complex plasmas

et al. 2012

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“…plasma containing macroscopic inclusions (dust) has been attracting significant research attention for more than three decades. This interest is based not only on the wide scope of research, from space physics and astrophysics [1], to technological issues related to plasma devices [2,3], but also related to the new physics of collective processes in such plasmas [4,5] since the presence of macroscopic particles (macroparticles, 'dust') significantly modifies plasma properties [4][5][6], even with visualization of the kinetics of collective plasma dynamics in laboratory [7,8].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic wave scattering and resonances in a complex plasma

Vladimirov

Ishihara

2017

Advances in Physics: X

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The electromagnetic wave propagation in a complex plasma containing macroparticle inclusions (dust) is reviewed. We focus on two classes of phenomena due to the presence of dust:(1), collection of plasma electrons and ions by macroparticle inclusions and related modification of dielectric properties, and (2), surface plasmon resonances on the macroparticle surfaces and their effect on electromagnetic wave propagation. It is demonstrated that the presence of these phenomena can significantly modify plasma electromagnetic properties by introducing additional (charging) damping, modifying field distributions near macroparticles, and leading to resonances and cut-offs in the effective permittivity. The conditions to observe such phenomena in laboratory dusty plasma and/or space (cosmic) dusty plasmas are discussed. ARTICLE HISTORY

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“…The model aptly takes care of the viscoelastic nature of the fluid through an additional time‐derivative in the momentum equation. Recently experimental studies on flow related problems in a dusty plasma medium have attracted a lot of interests because of its inherent richness . In case of a flowing dusty plasma, the medium acts like a viscoelastic fluid that possesses the features of memory of the medium.…”

Section: Introductionmentioning

confidence: 99%

Viscoelastic effects on asymmetric two‐dimensional vortex patterns in a strongly coupled dusty plasma

Gupta

Mukherjee

Ganesh

2019

Contributions to Plasma Physics

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Strongly coupled dusty plasma medium is often described as a viscoelastic fluid that retains its memory. In a flowing dusty plasma medium, vortices of different sizes appear when the flow does not remain laminar. The vortices also merge to transfer energy between different scales. In the present work, we study the effect of viscoelasticity and compressibility over a localized vortex structure and multiple rotational vortices in a strongly coupled viscoelastic dusty plasma medium. In case of single rotating vortex flow, a transverse wave is generated from the localized vortex source and the evolution time of generated waves is found to be reduced due to finite viscoelasticity and compressibility of the medium. It is found that the viscoelasticity suppresses the dispersion of vorticity. In the presence of multiple vortices, we find, the vortex mergers get highly affected in the presence of memory effect of the fluid, and thus the dynamics of the medium gets completely altered compared to a non‐viscoelastic fluid. For a compressible fluid, viscoelasticity dampens the energy in the sonic waves generated in the medium. Thus a highly viscoelastic and compressible fluid, in some cases, behaves similarly to an incompressible viscoelastic fluid. The wave‐front like rings propagate in elliptical orbits keeping the footprint of the earlier position of the point‐vortex. The rings collide with each other even within the patch vortex region forming regions of high vorticity at the point of intersection and pass through each other.

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Bow Shock Formation in a Complex Plasma

Cited by 51 publications

References 24 publications

On the wake structure in streaming complex plasmas

On the wake structure in streaming complex plasmas

Electromagnetic wave scattering and resonances in a complex plasma

Viscoelastic effects on asymmetric two‐dimensional vortex patterns in a strongly coupled dusty plasma

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