Monte Carlo simulation of colloidal particles dynamics in a drying drop

The work is devoted to particles dynamics simulation in a colloidal drop, when it dries on a substrate and the triple-phase boundary is fixed. Experimental observations [Deegan R.D. et. al., 2000] show a ring deposition on a solid substrate after full droplet desiccation. This phenomenon of macrolevel is known as coffee ring effect. There are other experiments that show a co-effect at the microlevel. We are talking about the formation of a quasicrystalline structure on the outer part of the ring and occurrence of an amorphous inner zone of ring [Marin A.G. et. al., 2011]. The goal of this work is to check the hypothesis of other authors that this phenomenon is explained by the competition between the characteristic times of diffusional displacement of particles and their transfer by a compensation flow [Marin A.G. et. al., 2011]. Numerical calculations using a two-dimensional model built on the basis of such assumptions and effects did not show formation of the amorphous zone. Probably, it is necessary to take into account the possibility of forming a multilayer structure of particles (3D-model).