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

Nikolai I. Lebovka, Yuri Yu. Tarasevich, Leonid A. Bulavin, Valery I. Kovalchuk, and Nikolai V. Vygornitskii
Phys. Rev. E 99, 052135 – Published 28 May 2019
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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), ρi, 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 ρi and u.

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  • Received 27 January 2019
  • Revised 29 March 2019

DOI:https://doi.org/10.1103/PhysRevE.99.052135

©2019 American Physical Society

Physics Subject Headings (PhySH)

Statistical Physics & Thermodynamics

Authors & Affiliations

Nikolai I. Lebovka1,2,*, Yuri Yu. Tarasevich3,†, Leonid A. Bulavin2, Valery I. Kovalchuk2, and Nikolai V. Vygornitskii1

  • 1Department of Physical Chemistry of Disperse Minerals, F. D. Ovcharenko Institute of Biocolloidal Chemistry, NAS of Ukraine, Kiev, Ukraine 03142
  • 2Department of Physics, Taras Shevchenko Kiev National University, Kiev, Ukraine 01033
  • 3Laboratory of Mathematical Modeling, Astrakhan State University, Astrakhan, Russia 414056

  • *Corresponding author: lebovka@gmail.com
  • Corresponding author: tarasevich@asu.edu.ru

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Issue

Vol. 99, Iss. 5 — May 2019

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