Contact line depinning from sharp edges

Parra Fabian, Ignacio E. and Graña-Otero, J. (2019). Contact line depinning from sharp edges. "Physical Review Fluids", v. 4 (n. 11); pp.. ISSN 2469-990X.


Title: Contact line depinning from sharp edges
  • Parra Fabian, Ignacio E.
  • Graña-Otero, J.
Item Type: Article
Título de Revista/Publicación: Physical Review Fluids
Date: 2019
ISSN: 2469-990X
Volume: 4
Faculty: E.T.S. de Ingeniería Aeronáutica y del Espacio (UPM)
Department: Matemática Aplicada a la Ingeniería Aeroespacial
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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With the aim of finding mathematical criteria for contact line depinning from sharp corners, we have studied the equilibrium and stability of a semi-infinite planar liquid layer pinned at the vertex of a wedge. Equilibrium is compatible with a fan of apparent contact angles θ0 bracketed by the equilibrium contact angles of both flanks of the wedge, so the contact line could remain pinned if θ0 is within this fan. However, the equilibrium becomes unstable at critical depinning advancing θa0 and receding θr0 contact angles, which are found as subcritical saddle-node bifurcations. Equilibrium is possible (stable) within the interval θr0<θ0<θa0, but the contact line depins from the vertex beyond these critical angles if they occur within the equilibrium fan.

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Item ID: 67029
DC Identifier:
OAI Identifier:
DOI: 10.1103/PhysRevFluids.4.114001
Official URL:
Deposited by: Memoria Investigacion
Deposited on: 16 Dec 2021 08:33
Last Modified: 16 Dec 2021 08:33
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