Nonviscous motion of a slow particle in a dust crystal under microgravity conditions

Zhukhovitskii, D. I.; Фортов, В. Е.; Molotkov, V. I.; Lipaev, A. M.; Naumkin, V. N.; Thomas, Hubertus M.; Ivlev, A. V.; Schwabe, Mierk; Morfill, G. E.

doi:10.1103/physreve.86.016401

Cited by 21 publications

(28 citation statements)

References 36 publications

(56 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As is seen from (38) and (39), the limit of validity of used theory is reached at sufficiently small particle diameters. Under the experimental conditions [35], the l.h.s.…”

Section: Analysis Of Experiemntal Datamentioning

confidence: 88%

“…Under the experimental conditions [35], the l.h.s. of (38) and (39) are close to unity, and therefore, the theory may be flawed in this region. In addition to the reasons of the inapplicability of (36) for the smallest particles discussed above, one can assume that in the presence of the particles in RF discharge, the electron temperature can be lower than that in the absence of the particles, i.e., less than 7 eV.…”

Section: Analysis Of Experiemntal Datamentioning

confidence: 99%

See 1 more Smart Citation

Dust acoustic waves in three-dimensional complex plasmas with a similarity property

Zhukhovitskii

2015

Phys. Rev. E

Self Cite

View full text Add to dashboard Cite

Dust acoustic waves in the bulk of a dust cloud in complex plasma of low-pressure gas discharge under microgravity conditions are considered. The complex plasma is assumed to conform to the ionization equation of state (IEOS) developed in our previous study. This equation implies the ionization similarity of plasmas. We find singular points of IEOS that determine the behavior of the sound velocity in different regions of the cloud. The fluid approach is utilized to deduce the wave equation that includes the neutral drag term. It is shown that the sound velocity is fully defined by the particle compressibility, which is calculated on the basis of the used IEOS. The sound velocities and damping rates calculated for different three-dimensional complex plasmas both in ac and dc discharges demonstrate a good correlation with experimental data that are within the limits of validity of the theory. The theory provides interpretation for the observed independence of the sound velocity on the coordinate and for a weak dependence on the particle diameter and gas pressure. Predictive estimates are made for the ongoing PK-4 experiment.

show abstract

“…As is seen from (38) and (39), the limit of validity of used theory is reached at sufficiently small particle diameters. Under the experimental conditions [35], the l.h.s.…”

Section: Analysis Of Experiemntal Datamentioning

confidence: 88%

Section: Analysis Of Experiemntal Datamentioning

confidence: 99%

Dust acoustic waves in three-dimensional complex plasmas with a similarity property

Zhukhovitskii

2015

Phys. Rev. E

Self Cite

View full text Add to dashboard Cite

show abstract

“…The gas pressure is 10 Pa. The projectile moves from left to right, is decelerated in the void and then moves upwards through the microparticle cloud [106]. Figure 14 shows a frame and the projectile trajectory from the simulation corresponding to the experiment that we have just described.…”

Section: Mach Conesmentioning

confidence: 99%

Simulating the dynamics of complex plasmas

Schwabe

Graves

2013

Phys. Rev. E

Self Cite

View full text Add to dashboard Cite

Complex plasmas are low temperature plasmas that contain micrometer-sized particles in addition to the neutral gas particles and the ions and electrons that make up the plasma. The microparticles interact strongly and display a wealth of collective effects. Here, we report on linked numerical simulations that reproduce many of the experimental results of complex plasmas. We model a capacitively coupled plasma with a fluid code written for the commercial package COMSOL. The output of this model is used to calculate forces on microparticles. The microparticles are modeled using the molecular dynamics package LAMMPS, which we extended to include the forces from the plasma. Using this method, we are able to reproduce void formation, the separation of particles of different sizes into layers, lane formation, vortex formation and other effects.

show abstract

“…Note that the radius of a probe particle could be underestimated in Ref. 38. Thus, at a p = 2.0 × 10 −3 cm, u s ≃ 1.77 cm/s.…”

Section: Velocity Of the Probe Motionmentioning

confidence: 92%

Driving force for a nonequilibrium phase transition in three-dimensional complex plasmas

Zhukhovitskii

2017

Physics of Plasmas

Self Cite

View full text Add to dashboard Cite

An example of the non-equilibrium phase transition is the formation of lanes when one kind of particles is driven against the other. According to experimental observation, lane formation in binary complex plasmas occurs when the smaller particles are driven through the stationary dust cloud of the larger particles. We calculate the driving force acting on a probe particle that finds itself in a quiescent cloud of particles in complex plasma of the low-pressure radio frequency discharge under microgravity conditions. It is shown that the nonzero driving force is a result of the dependence of the ion mean free path on the particle number density. If this effect is properly included in the model of similar complex plasmas then one arrives at the driving force that changes its sign at the point where the probe and the dust particles have equal radii. If the probe is smaller than the dust particle then the driving force is directed toward the discharge center and vice versa, in accordance with experiment. Obtained results can serve as the ansatz for future investigation of the lane formation in complex plasmas.

show abstract

Nonviscous motion of a slow particle in a dust crystal under microgravity conditions

Cited by 21 publications

References 36 publications

Dust acoustic waves in three-dimensional complex plasmas with a similarity property

Dust acoustic waves in three-dimensional complex plasmas with a similarity property

Simulating the dynamics of complex plasmas

Driving force for a nonequilibrium phase transition in three-dimensional complex plasmas

Contact Info

Product

Resources

About