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          Institute: MPI für Dynamik und Selbstorganisation     Collection: Dynamik komplexer Fluide     Display Documents



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ID: 339935.0, MPI für Dynamik und Selbstorganisation / Dynamik komplexer Fluide
Dewetting of Liquid Filaments in Wedge-Shaped Grooves
Authors:Khare, Krishnacharya; Brinkmann, Martin; Law, Bruce M.; Gurevich, Evgeny L.; Herminghaus, Stephan; Seemann, Ralf
Language:English
Date of Publication (YYYY-MM-DD):2007-10-26
Title of Journal:Langmuir
Volume:23
Issue / Number:24
Start Page:12138
End Page:12141
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:The dewetting of liquid filaments in linear grooves of a triangular cross section is studied experimentally and theoretically. Homogeneous filaments of glassy polystyrene (PS) are prepared in triangular grooves in a nonequilibrium state. At elevated temperatures, the molten PS restores its material contact angle with the substrate. Liquid filaments with a convex liquid-vapor interface decay into isolated droplets with a characteristic spacing depending on the wedge geometry, wettability, and filament width. This instability is driven by the interplay of local filament width and Laplace pressure and constitutes a wide class of 1D instabilities that also include the Rayleigh-Plateau instability as a special case. Our results show an accurately exponential buildup of the instability, suggesting that fluctuations have a minor influence in our system.
External Publication Status:published
Document Type:Article
Communicated by:Folkert Müller-Hoissen
Affiliations:MPI für Dynamik und Selbstorganisation/Dynamik komplexer Fluide
External Affiliations:Kansas State University, Manhattan, Kansas 66506, USA
Identifiers:DOI:10.1021/la701515u
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