249 research outputs found
The model of drying sessile drop of colloidal solution
We have proposed and investigated a model of drying colloidal suspension drop
placed onto a horizontal substrate in which the sol to gel phase transition
occurs. The temporal evolution of volume fraction of the solute and the gel
phase dynamics were obtained from numerical simulations. Our model takes into
account the fact that some physical quantities are dependent on volume fraction
of the colloidal particles.Comment: Submitted to IJMP
Percolation of the aligned dimers on a square lattice
Percolation and jamming phenomena are investigated for anisotropic sequential
deposition of dimers (particles occupying two adjacent adsorption sites) on a
square lattice. The influence of dimer alignment on the electrical conductivity
was examined. The percolation threshold for deposition of dimers was lower than
for deposition of monomers. Nevertheless, the problem belongs to the
universality class of random percolation. The lowest percolation threshold (pc
= 0.562) was observed for isotropic orientation of dimers. It was higher (pc =
0.586) in the case of dimers aligned strictly along one direction. The state of
dimer orientation influenced the concentration dependence of electrical
conductivity. The proposed model seems to be useful for description of the
percolating properties of anisotropic conductors.Comment: 6 pages, 9 figures, submitted to EPJ
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