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Dynamics of moving contact lines: A comparison between slip and precursor film models

Savva, Nikos ORCID: and Kalliadasis, S. 2011. Dynamics of moving contact lines: A comparison between slip and precursor film models. Europhysics Letters 94 (6) , 64004. 10.1209/0295-5075/94/64004

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The hydrodynamic equations for contact line motion are typically amended with different models to alleviate the stress singularity associated with the no-slip condition on the substrate. Using the spreading of a two-dimensional droplet as a prototype for a moving contact line, we study the dynamics of slip and precursor film models that are commonly used to cure the singularity. By considering the quasistatic spreading limit we establish equivalence relations that connect the slip and precursor film models. We examine these relations via numerical experiments and we show that they appear to persist even when the motion can no longer be treated as quasistatic. However, significantly different behaviors may be observed under certain conditions, particularly when multiple droplet equilibria are possible.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Mathematics
Subjects: Q Science > QA Mathematics
Publisher: EPL
ISSN: 0295-5075
Last Modified: 20 Oct 2022 08:14

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