Phys. Rev. Lett. 98, 244502 (2007) [4 pages]Absolute and Convective Instabilities of a Viscous Film Flowing Down a Vertical FiberReceived 14 December 2006; published 15 June 2007 The stability of a viscous film flowing down a vertical fiber under the action of gravity is analyzed both experimentally and theoretically. At large or small film thicknesses, the instability is convective, whereas an absolute instability mode is observed in an intermediate range of film thicknesses for fibers of small enough radius. The onset of the experimental irregular wavy regime corresponds precisely to the theoretical prediction of the threshold of the convective instability. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.98.244502
DOI:
10.1103/PhysRevLett.98.244502
PACS:
47.20.Ma, 68.03.Kn, 68.15.+e
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