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Article: Detachment of droplets in a fully developed turbulent channel flow

TitleDetachment of droplets in a fully developed turbulent channel flow
Authors
Issue Date2014
Citation
Aerosol Science and Technology, 2014, v. 48, n. 9, p. 916-923 How to Cite?
AbstractLiquid aerosols deform and detach from solid surfaces under an external force. It is a familiar phenomenon in many engineering applications. This article experimentally investigates the deformation and detachment of liquid droplets on three different solid surfaces in a fully developed turbulent channel flow. It is shown that the droplets either are compressed or elongate under the turbulent flow. The elongation of the droplet due to the turbulent flow is measured and presented. When the friction velocity of the flow exceeds a critical value, the droplets slide along the surface. The critical friction velocity is found empirically to be inversely proportional to the square root of the contact diameter. The sliding velocity after detachment is also reported. It has been observed by many researchers that, when the external force is gravity or a simple shear flow, the retention force of the droplet is proportional to the difference between the cosines of the receding and advancing contact angles. As the shape of a deformed droplet is much more complex under a turbulent flow, this article discusses the applicability of the same relation to the turbulent channel flow.
Persistent Identifierhttp://hdl.handle.net/10722/255965
ISSN
2019 Impact Factor: 2.34
2015 SCImago Journal Rankings: 1.922
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorFu, S. C.-
dc.contributor.authorLeung, W. T.-
dc.contributor.authorChao, Christopher Y.H.-
dc.date.accessioned2018-07-16T06:14:12Z-
dc.date.available2018-07-16T06:14:12Z-
dc.date.issued2014-
dc.identifier.citationAerosol Science and Technology, 2014, v. 48, n. 9, p. 916-923-
dc.identifier.issn0278-6826-
dc.identifier.urihttp://hdl.handle.net/10722/255965-
dc.description.abstractLiquid aerosols deform and detach from solid surfaces under an external force. It is a familiar phenomenon in many engineering applications. This article experimentally investigates the deformation and detachment of liquid droplets on three different solid surfaces in a fully developed turbulent channel flow. It is shown that the droplets either are compressed or elongate under the turbulent flow. The elongation of the droplet due to the turbulent flow is measured and presented. When the friction velocity of the flow exceeds a critical value, the droplets slide along the surface. The critical friction velocity is found empirically to be inversely proportional to the square root of the contact diameter. The sliding velocity after detachment is also reported. It has been observed by many researchers that, when the external force is gravity or a simple shear flow, the retention force of the droplet is proportional to the difference between the cosines of the receding and advancing contact angles. As the shape of a deformed droplet is much more complex under a turbulent flow, this article discusses the applicability of the same relation to the turbulent channel flow.-
dc.languageeng-
dc.relation.ispartofAerosol Science and Technology-
dc.titleDetachment of droplets in a fully developed turbulent channel flow-
dc.typeArticle-
dc.description.naturelink_to_OA_fulltext-
dc.identifier.doi10.1080/02786826.2014.938801-
dc.identifier.scopuseid_2-s2.0-84927662169-
dc.identifier.volume48-
dc.identifier.issue9-
dc.identifier.spage916-
dc.identifier.epage923-
dc.identifier.eissn1521-7388-
dc.identifier.isiWOS:000341526900002-

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