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Macroscopic Model for Sessile Droplet Evaporation on a Flat Surface
[Image: see text] Evaporation of sessile droplets on a flat surface involves a complex interplay between phase change, diffusion, advection, and surface forces. In an attempt to significantly reduce the complexity of the problem and to make it manageable, we propose a simple model hinged on a surfac...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American
Chemical Society
2018
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6193248/ https://www.ncbi.nlm.nih.gov/pubmed/30247043 http://dx.doi.org/10.1021/acs.langmuir.8b02374 |
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author | van der Heijden, Thijs W. G. Darhuber, Anton A. van der Schoot, Paul |
author_facet | van der Heijden, Thijs W. G. Darhuber, Anton A. van der Schoot, Paul |
author_sort | van der Heijden, Thijs W. G. |
collection | PubMed |
description | [Image: see text] Evaporation of sessile droplets on a flat surface involves a complex interplay between phase change, diffusion, advection, and surface forces. In an attempt to significantly reduce the complexity of the problem and to make it manageable, we propose a simple model hinged on a surface free-energy-based relaxation dynamics of the droplet shape, a diffusive evaporation model, and a contact line pinning mechanism governed by a yield stress. Our model reproduces the known dynamics of droplet shape relaxation and of droplet evaporation, both in the absence and in the presence of contact line pinning. We show that shape relaxation during evaporation significantly affects the lifetime of a drop. We find that the dependence of the evaporation time on the initial contact angle is a function of the competition between the shape relaxation and evaporation and is strongly affected by any contact line pinning. |
format | Online Article Text |
id | pubmed-6193248 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | American
Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-61932482018-10-19 Macroscopic Model for Sessile Droplet Evaporation on a Flat Surface van der Heijden, Thijs W. G. Darhuber, Anton A. van der Schoot, Paul Langmuir [Image: see text] Evaporation of sessile droplets on a flat surface involves a complex interplay between phase change, diffusion, advection, and surface forces. In an attempt to significantly reduce the complexity of the problem and to make it manageable, we propose a simple model hinged on a surface free-energy-based relaxation dynamics of the droplet shape, a diffusive evaporation model, and a contact line pinning mechanism governed by a yield stress. Our model reproduces the known dynamics of droplet shape relaxation and of droplet evaporation, both in the absence and in the presence of contact line pinning. We show that shape relaxation during evaporation significantly affects the lifetime of a drop. We find that the dependence of the evaporation time on the initial contact angle is a function of the competition between the shape relaxation and evaporation and is strongly affected by any contact line pinning. American Chemical Society 2018-09-24 2018-10-16 /pmc/articles/PMC6193248/ /pubmed/30247043 http://dx.doi.org/10.1021/acs.langmuir.8b02374 Text en Copyright © 2018 American Chemical Society This is an open access article published under a Creative Commons Non-Commercial No Derivative Works (CC-BY-NC-ND) Attribution License (http://pubs.acs.org/page/policy/authorchoice_ccbyncnd_termsofuse.html) , which permits copying and redistribution of the article, and creation of adaptations, all for non-commercial purposes. |
spellingShingle | van der Heijden, Thijs W. G. Darhuber, Anton A. van der Schoot, Paul Macroscopic Model for Sessile Droplet Evaporation on a Flat Surface |
title | Macroscopic Model for Sessile Droplet Evaporation
on a Flat Surface |
title_full | Macroscopic Model for Sessile Droplet Evaporation
on a Flat Surface |
title_fullStr | Macroscopic Model for Sessile Droplet Evaporation
on a Flat Surface |
title_full_unstemmed | Macroscopic Model for Sessile Droplet Evaporation
on a Flat Surface |
title_short | Macroscopic Model for Sessile Droplet Evaporation
on a Flat Surface |
title_sort | macroscopic model for sessile droplet evaporation
on a flat surface |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6193248/ https://www.ncbi.nlm.nih.gov/pubmed/30247043 http://dx.doi.org/10.1021/acs.langmuir.8b02374 |
work_keys_str_mv | AT vanderheijdenthijswg macroscopicmodelforsessiledropletevaporationonaflatsurface AT darhuberantona macroscopicmodelforsessiledropletevaporationonaflatsurface AT vanderschootpaul macroscopicmodelforsessiledropletevaporationonaflatsurface |