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Journal Articles EPL - Europhysics Letters Year : 2024

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

Bharti Bharti
  • Function : Author
Andreas Carlson
Tak Shing Chan
  • Function : Author

Abstract

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.
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Dates and versions

hal-04351854 , version 1 (18-12-2023)

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Bharti Bharti, Andreas Carlson, Tak Shing Chan, Thomas Salez. Plateau-Rayleigh instability of a viscous film on a soft fiber. EPL - Europhysics Letters, 2024, 145, pp.67001. ⟨hal-04351854⟩

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