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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.1c00806
|2 doi
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|a eng
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|a Katre, Pallavi
|e verfasserin
|4 aut
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|a Evaporation Dynamics of a Sessile Droplet of Binary Mixture Laden with Nanoparticles
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|c 2021
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Revised 25.05.2021
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a We investigate the evaporation dynamics of a sessile droplet of ethanol-water binary mixtures of different compositions laden with alumina nanoparticles and compare with the no-loading condition at different substrate temperatures. Shadowgraphy and infrared imaging methods are used, and the experimental images are postprocessed using a machine learning technique. We found that the loading and no-loading cases display distinct wetting and contact angle dynamics. Although the wetting diameter of a droplet decreases monotonically in the absence of loading, the droplet with 0.6 wt % nanoparticle loading remains pinned for the majority of its lifetime. The temporal variation of the normalized droplet volume in the no-loading case has two distinct slopes, with ethanol and water phases dominating the early and late stages of evaporation, respectively. The normalized droplet volume with 0.6 wt % loading displays a nearly linear behavior because of the increase in the heat transfer rate. Our results from infrared imaging reveal that a nanofluid droplet displays far richer thermal patterns than a droplet without nanoparticle loading. In nanoparticle-laden droplets, the pinning effect, as well as the resulting thermo-capillary and thermo-solutal convection, causes more intense internal mixing and a faster evaporation rate. Finally, a theoretical model is also developed that satisfactorily predicts the evaporation dynamics of binary nanofluid droplets
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|a Journal Article
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|a Balusamy, Saravanan
|e verfasserin
|4 aut
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| 700 |
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|a Banerjee, Sayak
|e verfasserin
|4 aut
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| 700 |
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|a Chandrala, Lakshmana Dora
|e verfasserin
|4 aut
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| 700 |
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|a Sahu, Kirti Chandra
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 37(2021), 20 vom: 25. Mai, Seite 6311-6321
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:37
|g year:2021
|g number:20
|g day:25
|g month:05
|g pages:6311-6321
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|u http://dx.doi.org/10.1021/acs.langmuir.1c00806
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