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dc.creatorCao, Z.en
dc.creatorVlachogiannis, M.en
dc.creatorBontozoglou, V.en
dc.date.accessioned2015-11-23T10:24:19Z
dc.date.available2015-11-23T10:24:19Z
dc.date.issued2013
dc.identifier10.1017/jfm.2012.612
dc.identifier.issn0022-1120
dc.identifier.urihttp://hdl.handle.net/11615/26507
dc.description.abstractThe primary instability of liquid film flow along periodically corrugated substrates is studied experimentally. Two different wall shapes, of the same wavelength and height, are tested for a wide range of inclinations. It is found that, beyond a specific inclination, a new instability mode occurs before the classical, convective, long-wave one. This is a short, travelling wave, which is highly regular and persistently two-dimensional, and appears to be a global mode. The exact shape of the corrugations has a leading-order effect on the inclination at which the new mode appears and on its wavelength at inception. Compared with the behaviour of film flow on a flat substrate, the presently tested periodic walls are found to delay very significantly, but each one to a different extent, the onset of the primary instability. This delay increases with inclination, and presents a distinct discontinuity when transition from the long-to the short-wave mode takes place.en
dc.sourceJournal of Fluid Mechanicsen
dc.source.uri<Go to ISI>://WOS:000314643700012
dc.subjectthin filmsen
dc.subjectwaves/free-surface flowsen
dc.subjectTHIN LIQUID-FILMSen
dc.subjectVISCOUS FILMSen
dc.subjectSURFACEen
dc.subjectWALLen
dc.subjectTOPOGRAPHYen
dc.subjectSTABILITYen
dc.subjectINERTIAen
dc.subjectINSTABILITIESen
dc.subjectEVOLUTIONen
dc.subjectINCLINEen
dc.subjectMechanicsen
dc.subjectPhysics, Fluids & Plasmasen
dc.titleExperimental evidence for a short-wave global mode in film flow along periodic corrugationsen
dc.typejournalArticleen


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