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231224s2016 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.6b00307
|2 doi
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|a pubmed24n0865.xml
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|a DE-627
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|a eng
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|a Chandramohan, Aditya
|e verfasserin
|4 aut
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|a Marangoni Convection in Evaporating Organic Liquid Droplets on a Nonwetting Substrate
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|c 2016
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|a Text
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|2 rdacontent
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Completed 21.05.2018
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|a Date Revised 21.05.2018
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a We quantitatively characterize the flow field inside organic liquid droplets evaporating on a nonwetting substrate. A mushroom-structured surface yields the desired nonwetting behavior with methanol droplets, while use of a cooled substrate (5-15 °C) slows the rate of evaporation to allow quasi-static particle image velocimetry. Visualization reveals a toroidal vortex within the droplet that is characteristic of surface tension-driven flow; we demonstrate by means of a scaling analysis that this recirculating flow is Marangoni convection. The velocities in the droplet are on the order of 10-45 mm/s. Thus, unlike in the case of evaporation on wetting substrates where Marangoni convection can be ignored for the purpose of estimating the evaporation rate, advection due to the surface tension-driven flow plays a dominant role in the heat transfer within an evaporating droplet on a nonwetting substrate because of the large height-to-radius aspect ratio of the droplet. We formulate a reduced-order model that includes advective transport within the droplet for prediction of organic liquid droplet evaporation on a nonwetting substrate and confirm that the predicted temperature differential across the height of the droplet matches experiments
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|a Journal Article
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|a Dash, Susmita
|e verfasserin
|4 aut
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|a Weibel, Justin A
|e verfasserin
|4 aut
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|a Chen, Xuemei
|e verfasserin
|4 aut
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|a Garimella, Suresh V
|e verfasserin
|4 aut
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 32(2016), 19 vom: 17. Mai, Seite 4729-35
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:32
|g year:2016
|g number:19
|g day:17
|g month:05
|g pages:4729-35
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|u http://dx.doi.org/10.1021/acs.langmuir.6b00307
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