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|Title:||Three-dimensional Monte Carlo model of the coffee-ring effect in evaporating colloidal droplets||Authors:||Crivoi, Alexandru
|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.||URI:||https://hdl.handle.net/10356/104038
|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 http://creativecommons.org/licenses/by-nc-nd/3.0||Fulltext Permission:||open||Fulltext Availability:||With Fulltext|
|Appears in Collections:||MAE Journal Articles|
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