Determination of yield stress of 2D (Yukawa) dusty plasma

Liu, Bin; Goree, J.

doi:10.1063/1.4994840

Cited by 16 publications

(1 citation statement)

References 49 publications

(51 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For this, we have added two additional forces in the simulation. First is the neutral drag force due to the relative velocity v between the dust grains and neutral particles and is given by [35,39,40]:…”

Section: Simulation Detailsmentioning

confidence: 99%

Spiral waves in driven strongly coupled Yukawa systems

Kumar

Das

2018

Phys. Rev. E

View full text Add to dashboard Cite

Spiral wave formations are ubiquitous in nature. In the present paper, the excitation of spiral waves in the context of driven two-dimensional dusty plasma (Yukawa system) has been demonstrated at particle level using molecular-dynamics simulations. The interaction amidst dust particles is modeled by the Yukawa potential to take account of the shielding of dust charges by the lighter electron and ion species. The spatiotemporal evolution of these spiral waves has been characterized as a function of the frequency and amplitude of the driving force and dust neutral collisions. The effect of strong coupling has been studied, which shows that the excited spiral wave structures get clearer as the medium gets more strongly coupled. The radial propagation speed of the spiral wave is observed to remain unaltered with the coupling parameter. However, it is found to depend on the screening parameter of the dust medium and decreases when it is increased. In the crystalline phase (with screening parameter κ>0.58), the spiral wavefronts are shown to be hexagonal in shape. This shows that the radial propagation speed depends on the interparticle spacing.

show abstract

Section: Simulation Detailsmentioning

confidence: 99%

Spiral waves in driven strongly coupled Yukawa systems

Kumar

Das

2018

Phys. Rev. E

View full text Add to dashboard Cite

show abstract

Tutorial: Langevin Dynamics methods for aerosol particle trajectory simulations and collision rate constant modeling

Suresh

Gopalakrishnan

2021

Journal of Aerosol Science

View full text Add to dashboard Cite

Interplay of single particle and collective response in molecular dynamics simulation of dusty plasma system

et al. 2018

View full text Add to dashboard Cite

Collective response of the plasma medium is well known and has been explored extensively in the context of dusty plasma medium. On the other hand, individual particle response associated with the collisional character giving rise to dissipative phenomena has not been explored adequately. In this paper two-dimensional (2-D) molecular dynamics (MD) simulation of dust particles interacting via Yukawa potential has been considered. It has been shown that disturbances induced in a dust crystal elicit both collective and single particle responses. Generation of a few particles moving at speeds considerably higher than acoustic and/or shock speed ( excited by the external disturbance) are observed. This is an indication of a single particle response. Furthermore, as these individual energetic particles propagate, the dust crystal is observed to crack along their path. Initially when the energy is high these particles generate secondary energetic particles by collisional scattering process. However, ultimately as these particles slow down they excite collective response in the dust medium at secondary locations in a region which is undisturbed by the primary external disturbance. The condition when the cracking of the crystal stops and collective excitations get initiated has been identified quantitatively. The trailing collective primary disturbances would thus often encounter a disturbed medium with secondary and tertiary collective perturbations, thereby suffering significant modification in its propagation. It is thus clear that there is an interesting interplay (other than mere dissipation) between the single particle and collective response which governs the dynamics of any disturbance introduced in the medium.

show abstract

Determination of yield stress of 2D (Yukawa) dusty plasma

Cited by 16 publications

References 49 publications

Spiral waves in driven strongly coupled Yukawa systems

Spiral waves in driven strongly coupled Yukawa systems

Tutorial: Langevin Dynamics methods for aerosol particle trajectory simulations and collision rate constant modeling

Interplay of single particle and collective response in molecular dynamics simulation of dusty plasma system

Contact Info

Product

Resources

About