Plateau-Rayleigh instability of a viscous film on a soft fiber

被引：1

作者：

Bharti ^{[1
,2
]}

Carlson, Andreas ^{[2
]}

Chan, Tak Shing ^{[2
]}

Salez, Thomas ^{[1
]}

机构：

[1] Univ Bordeaux, CNRS, LOMA, UMR 5798, F-33400 Talence, France

[2] Univ Oslo, Dept Math, Mech Div, N-0316 Oslo, Norway

来源：

EPL | 2024年 / 145卷 / 05期

关键词：

LIQUID-FILMS; THIN; THREAD; STABILITY; DYNAMICS; BEADS;

D O I：

10.1209/0295-5075/ad2e77

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

- We theoretically study the Plateau-Rayleigh instability of a thin viscous film covering a fiber consisting of a rigid cylindrical core coated with a thin compressible elastic layer. We develop a soft-lubrication model, combining the capillary-driven flow in the viscous film to the elastic deformation of the soft coating, within the Winkler-foundation framework. We perform a linear-stability analysis and derive the dispersion relation. We find that the growth rate is larger when the soft coating is more compliant. As such, softness acts as a destabilising factor. In contrast, increasing the thickness of the soft coating reduces the growth rate, due to the dominating geometrical effect.

引用

页数：6

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