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dc.contributor.authorBenkreira, Hadj
dc.date.accessioned2008-10-29T09:51:50Z
dc.date.available2008-10-29T09:51:50Z
dc.date.issued2004
dc.identifier.citationBenkreira, H. (2004). The effect of substrate roughness on air entrainment in dip coating. Chemical Engineering Science. Vol. 59, No. 13, pp. 2745-2751.en
dc.identifier.urihttp://hdl.handle.net/10454/807
dc.descriptionYesen
dc.description.abstractDynamic wetting failure was observed in the simple dip coating flow with a series of substrates, which had a rough side and a comparatively smoother side. When we compared the air entrainment speeds on both sides, we found a switch in behaviour at a critical viscosity. At viscosity lower than a critical value, the rough side entrained air at lower speeds than the smooth side. Above the critical viscosity the reverse was observed, the smooth side entraining air at lower speed than the rough side. Only substrates with significant roughness showed this behaviour. Below a critical roughness, the rough side always entrained air at lower speeds than the smooth side. These results have both fundamental and practical merits. They support the hydrodynamic theory of dynamic wetting failure and imply that one can coat viscous fluids at higher speeds than normal by roughening substrates. A mechanism and a model are presented to explain dynamic wetting failure on rough surfaces.en
dc.language.isoenen
dc.relation.isreferencedbyhttp://dx.doi.org/10.1016/j.ces.2007.09.045en
dc.rights© 2004 Elsevier Ltd. Reproduced in accordance with the publisher's self-archiving policy.en
dc.subjectAir Entrainmenten
dc.subjectDip Coatingen
dc.subjectRoughnessen
dc.subjectDynamic Wetting Failureen
dc.titleThe effect of substrate roughness on air entrainment in dip coatingen
dc.status.refereedYesen
dc.typeArticleen
refterms.dateFOA2018-07-18T02:07:54Z


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