Moment fluid equations for ions in weakly ionized plasma

Semenov, Igor

doi:10.1103/physreve.95.043208

Cited by 4 publications

(10 citation statements)

References 59 publications

(103 reference statements)

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“…The ion component was described by means of the fluid model based on the moment equations proposed in Ref. [28]. The microparticles were treated as a fluid within the drift-diffusion model considered previously in a number of works [29][30][31][32][33].…”

Section: Model a Basic Equationsmentioning

confidence: 99%

“…The adopted Monte-Carlo model of the electron-atom and electron-microparticle collisions was based on that of Ref. [28]. The absorption of the electrons by the microparticles was modeled as an additional collision process with the orbit-motion-limited (OML) [34] crosssection.…”

Section: Model a Basic Equationsmentioning

confidence: 99%

“…The governing equations for ions included the continuity, momentum and energy equations [28]. The continuity equation reads…”

Section: Model a Basic Equationsmentioning

confidence: 99%

“…where Π i = p i + m i n i u 2 i and δ is a correction coefficient introduced in Ref. [28]. Note that the effect of the ionmicroparticle collisions is neglected in Eq.…”

Section: Model a Basic Equationsmentioning

confidence: 99%

“…Following the results of Ref. [28], the ion velocity distribution function was defined using the model of Ref. [42] (applied for the local mean velocity u i ).…”

Section: Model a Basic Equationsmentioning

confidence: 99%

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Capacitively coupled rf discharge with a large amount of microparticles: Spatiotemporal emission pattern and microparticle arrangement

et al. 2017

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The effect of micron-sized particles on a low-pressure capacitively-coupled rf discharge is studied both experimentally and using numerical simulations. In the laboratory experiments, microparticle clouds occupying a considerable fraction of the discharge volume are supported against gravity with the help of the thermophoretic force. The spatiotemporally resolved optical emission measurements are performed with different arrangements of microparticles. The numerical simulations are carried out on the basis of a one-dimensional hybrid (fluid-kinetic) discharge model describing the interaction between plasma and microparticles in a self-consistent way. The study is focused on the role of microparticle arrangement in interpreting the spatiotemporal emission measurements. We show that it is not possible to reproduce simultaneously the observed microparticle arrangement and emission pattern in the framework of the considered one-dimensional model. This disagreement is discussed and attributed to two-dimensional effects, e.g., radial diffusion of the plasma components.

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Section: Model a Basic Equationsmentioning

confidence: 99%

Section: Model a Basic Equationsmentioning

confidence: 99%

“…The governing equations for ions included the continuity, momentum and energy equations [28]. The continuity equation reads…”

Section: Model a Basic Equationsmentioning

confidence: 99%

“…where Π i = p i + m i n i u 2 i and δ is a correction coefficient introduced in Ref. [28]. Note that the effect of the ionmicroparticle collisions is neglected in Eq.…”

Section: Model a Basic Equationsmentioning

confidence: 99%

“…Following the results of Ref. [28], the ion velocity distribution function was defined using the model of Ref. [42] (applied for the local mean velocity u i ).…”

Section: Model a Basic Equationsmentioning

confidence: 99%

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Capacitively coupled rf discharge with a large amount of microparticles: Spatiotemporal emission pattern and microparticle arrangement

et al. 2017

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Physical aspects of dust–plasma interactions

Pustylnik

Pikalev

Zobnin

et al. 2021

Contributions to Plasma Physics

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Low‐pressure gas discharge plasmas are known to be strongly affected by the presence of small dust particles. This issue plays a role in the investigations of dust particle‐forming plasmas, where the dust‐induced instabilities may affect the properties of synthesized dust particles. Also, gas discharges with large amounts of microparticles are used in microgravity experiments, where strongly coupled subsystems of charged microparticles represent particle‐resolved models of liquids and solids. In this field, deep understanding of dust–plasma interactions is required to construct the discharge configurations which would be able to model the desired generic condensed matter physics as well as, in the interpretation of experiments, to distinguish the plasma phenomena from the generic condensed matter physics phenomena. In this review, we address only physical aspects of dust–plasma interactions, that is, we always imply constant chemical composition of the plasma as well as constant size of the dust particles. We also restrict the review to two discharge types: dc discharge and capacitively coupled rf discharge. We describe the experimental methods used in the investigations of dust–plasma interactions and show the approaches to numerical modelling of the gas discharge plasmas with large amounts of dust. Starting from the basic physical principles governing the dust–plasma interactions, we discuss the state‐of‐the‐art understanding of such complicated, discharge‐type‐specific phenomena as dust‐induced stratification and transverse instability in a dc discharge or void formation and heartbeat instability in an rf discharge.

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Interaction of a supersonic particle with a three-dimensional complex plasma

et al. 2018

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The influence of a supersonic projectile on a three-dimensional complex plasma is studied. Micron sized particles in a low-temperature plasma formed a large undisturbed system in the new "Zyflex" chamber during microgravity conditions. A supersonic probe particle excited a Mach cone with Mach number M ≈ 1.5 − 2 and double Mach cone structure in the large weakly damped particle cloud. The speed of sound is measured with different methods and particle charge estimations are compared to calculations from standard theories. The high image resolution enables the study of Mach cones in microgravity on the single particle level of a three-dimensional complex plasma and gives insight to the dynamics. A heating of the microparticles is discovered behind the supersonic projectile but not in the flanks of the Mach cone.

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Moment fluid equations for ions in weakly ionized plasma

Cited by 4 publications

References 59 publications

Capacitively coupled rf discharge with a large amount of microparticles: Spatiotemporal emission pattern and microparticle arrangement

Capacitively coupled rf discharge with a large amount of microparticles: Spatiotemporal emission pattern and microparticle arrangement

Physical aspects of dust–plasma interactions

Interaction of a supersonic particle with a three-dimensional complex plasma

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