Filament formation via the instability of a stretching viscous sheet: Physical mechanism, linear theory, and fiber applications

Filament formation via the instability of a stretching viscous sheet: Physical mechanism, linear theory, and fiber applications

© 2019 American Physical Society. Many intriguing patterns are driven by fluid instabilities, even down to micrometer and nanometer scales, with numerous technological and industrial applications. Here, we propose a novel physical mechanism for filament formation in a stretched viscous sheet by comb...

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Bibliographic Details
Main Authors: Xu, Bingrui, Li, Minhao, Wang, Feng, Johnson, Steven G, Fink, Yoel, Deng, Daosheng
Other Authors: Massachusetts Institute of Technology. Department of Mathematics
Format: Article
Language:English
Published: American Physical Society (APS) 2021
Online Access:https://hdl.handle.net/1721.1/136122
Description
Summary:© 2019 American Physical Society. Many intriguing patterns are driven by fluid instabilities, even down to micrometer and nanometer scales, with numerous technological and industrial applications. Here, we propose a novel physical mechanism for filament formation in a stretched viscous sheet by combining stretching and van der Waals forces. We show that a transverse instability is enhanced while the longitudinal instability is suppressed, resulting in filamentation. We find a close agreement between the experimental data and the predictions of a linear-stability analysis. These results offer a pathway to achieving sophisticated microstructuring-nanostructuring for functional devices in either a single fiber or in integrated fabrics for large-scale textiles.

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