Sedimentation of a suspension of rods: Monte Carlo simulation of a continuous two-dimensional problem

2019/01/31 by Nikolai I. Lebovka, Nikolaï Lebovka, Yuri Yu. Tarasevich +5 · 15 citations
Chemistry · Materials Science · Mathematics · Physics and Astronomy · #Anisotropy #Brownian dynamics #Brownian motion #Condensed matter physics #Electrostatics and Colloid Interactions #Geology #Geomorphology #Material Dynamics and Properties #Materials science #Mathematics #Monte Carlo method #Optics #Physics #Quantum mechanics #Rod #Sediment #Sedimentation #Suspension (topology) #Theoretical and Computational Physics #cond-mat.soft #cond-mat.stat-mech

paper · pdf · doi:10.1103/physreve.99.052135

published in Physical review. E 99(5), 052135 (American Physical Society) · 11 pages, 11 figures, 68 references

arxiv created 2019/03/29 · openalex publication_date 2019/05/28 · arxiv updated 2019/06/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

The sedimentation of a two-dimensional suspension containing rods was studied by means of Monte Carlo (MC) simulations. An off-lattice model with continuous positional and orientational degrees of freedom was considered. The initial state before sedimentation was produced using a model of random sequential adsorption. During such sedimentation, the rods undergo translational and rotational Brownian motions. The MC simulations were run at different initial number densities (the numbers of rods per unit area), ρ_i, and sedimentation rates, u. For sediment films, the spatial distributions of the rods, the order parameters, and the electrical conductivities were examined. Different types of sedimentation-driven self-assembly and anisotropy of the electrical conductivity were revealed inside the sediment films. This anisotropy can be finely regulated by changes in the values of ρ_i and u.

Citations

• Reentrant disordered phase in a system of repulsive rods on a Bethe-like lattice
• THE EFFECTS OF SHAPE ON THE INTERACTION OF COLLOIDAL PARTICLES
• Hydrodynamic and Brownian Fluctuations in Sedimenting Suspensions
• Nonmonotonic size dependence of the critical concentration in 2D percolation of straight rigid rods under equilibrium conditions
• Nematic-disordered phase transition in systems of long rigid rods on two-dimensional lattices
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• Vertical drying of a suspension of sticks: Monte Carlo simulation for continuous two-dimensional problem
• Steady state sedimentation of ultrasoft colloids