Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/95589
DC Field | Value | Language |
---|---|---|
dc.contributor | Department of Mechanical Engineering | en_US |
dc.creator | Zhang, Z | en_US |
dc.creator | Zhang, P | en_US |
dc.date.accessioned | 2022-09-22T06:14:00Z | - |
dc.date.available | 2022-09-22T06:14:00Z | - |
dc.identifier.issn | 0743-7463 | en_US |
dc.identifier.uri | http://hdl.handle.net/10397/95589 | - |
dc.language.iso | en | en_US |
dc.publisher | American Chemical Society | en_US |
dc.rights | © 2019 American Chemical Society | en_US |
dc.rights | This document is the Accepted Manuscript version of a Published Work that appeared in final form in Langmuir, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.langmuir.9b02736. | en_US |
dc.title | Numerical interpretation to the roles of liquid viscosity in droplet spreading at small Weber numbers | en_US |
dc.type | Journal/Magazine Article | en_US |
dc.description.otherinformation | Title on author’s file: On the roles of liquid viscosity in droplet spreading at small Weber numbers | en_US |
dc.identifier.spage | 16164 | en_US |
dc.identifier.epage | 16171 | en_US |
dc.identifier.volume | 35 | en_US |
dc.identifier.issue | 49 | en_US |
dc.identifier.doi | 10.1021/acs.langmuir.9b02736 | en_US |
dcterms.abstract | Droplet impacting a free-slip plane at small Weber numbers (We < 30) was numerically investigated by a front tracking method, with particular emphasis on clarifying the roles of the liquid viscosity and the "left-over" internal kinetic energy in droplet spreading. The most interesting discovery is that there exists a certain range of We in which the maximum diameter rate, Dm, shows a nonmonotonic variation with the Reynolds number, Re. This non-monotonic variation is owing to the dual role of liquid viscosity in influencing droplet spreading. Specifically, when the initial surface energy is comparable to the initial kinetic energy (the corresponding We is around 10-30), the high strain rates of the droplet internal flow dominate its viscous dissipation at a relatively large Re, while the liquid viscosity dominates the viscous dissipation at a relatively small Re. Furthermore, to unravel the influence of droplet attachment and detachment on droplet spreading, we considered two limiting situations such as full attachment (with no gas film throughout droplet spreading) and full detachment (with a gas film throughout droplet spreading). The results show that the droplet with a gas film tends to generate a stronger vortical motion in its rim, results in a larger left-over kinetic energy, and hence causes a smaller spreading. | en_US |
dcterms.accessRights | open access | en_US |
dcterms.bibliographicCitation | Langmuir, 10 Dec. 2019, v. 35, no. 49, p. 16164-16171 | en_US |
dcterms.isPartOf | Langmuir | en_US |
dcterms.issued | 2019-12-10 | - |
dc.identifier.scopus | 2-s2.0-85076325520 | - |
dc.identifier.pmid | 31718189 | - |
dc.description.validate | 202209_bcww | en_US |
dc.description.oa | Accepted Manuscript | en_US |
dc.identifier.FolderNumber | ME-0347 | - |
dc.description.fundingSource | RGC | en_US |
dc.description.fundingSource | Others | en_US |
dc.description.fundingText | The Hong Kong Polytechnic University | en_US |
dc.description.pubStatus | Published | en_US |
dc.identifier.OPUS | 55022278 | - |
dc.description.oaCategory | Green (AAM) | en_US |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Zhang_Numerical_Interpretation_Roles.pdf | Pre-Published version | 1.8 MB | Adobe PDF | View/Open |
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