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Title: Three-dimensional Monte Carlo model of the coffee-ring effect in evaporating colloidal droplets
Authors: Crivoi, Alexandru
Duan, Fei
Keywords: DRNTU::Engineering::Mechanical engineering::Fluid mechanics
Issue Date: 2014
Source: Crivoi, A., & Duan, F. (2014). Three-dimensional Monte Carlo model of the coffee-ring effect in evaporating colloidal droplets. Scientific Reports, 4, 4310-.
Series/Report no.: Scientific reports
Abstract: The residual deposits usually left near the contact line after pinned sessile colloidal droplet evaporation are commonly known as a “coffee-ring” effect. However, there were scarce attempts to simulate the effect, and the realistic fully three-dimensional (3D) model is lacking since the complex drying process seems to limit the further investigation. Here we develop a stochastic method to model the particle deposition in evaporating a pinned sessile colloidal droplet. The 3D Monte Carlo model is developed in the spherical-cap-shaped droplet. In the algorithm, the analytical equations of fluid flow are used to calculate the probability distributions for the biased random walk, associated with the drift-diffusion equations. We obtain the 3D coffee-ring structures as the final results of the simulation and analyze the dependence of the ring profile on the particle volumetric concentration and sticking probability.
ISSN: 2045-2322
DOI: 10.1038/srep04310
Rights: This work is licensed under a Creative Commons Attribution- NonCommercial-NoDerivs 3.0 Unported license. To view a copy of this license,visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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