scholarly journals Self-diffusion in two-dimensional hard ellipsoid suspensions

2010 ◽  
Vol 133 (12) ◽  
pp. 124509 ◽  
Author(s):  
Zhongyu Zheng ◽  
Yilong Han
Keyword(s):  
Two Dimensional ◽  
Self Diffusion ◽  
Hard Ellipsoid

scholarly journals Long-time self-diffusion in quasi-two-dimensional colloidal fluids of paramagnetic particles

2020 ◽  
Vol 101 (4) ◽  
Author(s):  
Nima H. Siboni ◽  
Alice L. Thorneywork ◽  
Alicia Damm ◽  
Roel P. A. Dullens ◽  
Jürgen Horbach
Keyword(s):  
Two Dimensional ◽  
Self Diffusion ◽  
Colloidal Fluids ◽  
Long Time

Defects related self-diffusion in a two-dimensional dusty plasma crystal

2002 ◽  
Vol 35 (45) ◽  
pp. 9535-9540 ◽  
Author(s):  
Yanhong Liu ◽  
Bin Liu ◽  
Si-Ze Yang ◽  
Long Wang
Keyword(s):  
Dusty Plasma ◽  
Two Dimensional ◽  
Self Diffusion ◽  
Plasma Crystal

scholarly journals Non-Gaussian, transiently anomalous and ergodic self-diffusion of flexible dumbbells in crowded two-dimensional environments: coupled translational and rotational motions

2021 ◽  
Author(s):  
Kolja Klett ◽  
Andrey G Cherstvy ◽  
Jaeoh Shin ◽  
Igor M Sokolov ◽  
Ralf Metzler
Keyword(s):  
Relative Motion ◽  
Center Of Mass ◽  
Scaling Exponent ◽  
Two Dimensional ◽  
Particle Structure ◽  
Self Diffusion ◽  
Experimental Systems ◽  
Long Time ◽  
Non Gaussian ◽  
Dynamics Simulations

We employ Langevin-dynamics simulations to unveil non-Brownian and non-Gaussian center-of-mass self-diffusion of massive flexible dumbbell-shaped particles in crowded two-dimensional solutions. We also study the intra-dumbbell dynamics due to the relative motion of the two constituent elastically-coupled disks. Our main focus is on effects of the crowding fraction φ and the particle structure on the diffusion characteristics. We evaluate the time-averaged mean-squared displacement (TAMSD), the displacement probability-density function (PDF) and the displacement autocorrelation function (ACF) of the dimers. For the TAMSD at highly crowded conditions of dumbbells, e.g., we observe a transition from the short-time ballistic behavior, via an intermediate subdiffusive regime, to long-time Brownian-like spreading dynamics. The crowded system of dimers exhibits two distinct diffusion regimes distinguished by the scaling exponent of the TAMSD, the dependence of the diffusivity on φ, and the features of the displacement-ACF. We attribute these regimes to a crowding-induced transition from a viscous to a viscoelastic diffusion medium upon growing φ. We also analyze the relative motion in the dimers, finding that larger φ suppress their vibrations and yield strongly non-Gaussian PDFs of rotational displacements. For the diffusion coefficients D(φ) of translational and rotational motion of the dumbbells an exponential decay with φ for weak and a power-law D(φ) ∝ (φ - φ*)2.4 for strong crowding is found. A comparison of simulation results with theoretical predictions for D(φ) is discussed and some relevant experimental systems are overviewed.

Self-Diffusion in the Two-Dimensional, Classical Electron Gas

1979 ◽  
Vol 43 (14) ◽  
pp. 979-982 ◽  
Author(s):  
J. P. Hansen ◽  
D. Levesque ◽  
J. J. Weis
Keyword(s):  
Electron Gas ◽  
Two Dimensional ◽  
Classical Electron ◽  
Self Diffusion ◽  
Classical Electron Gas
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