Out-of-contact elastohydrodynamic deformation due to lubrication forces

Abstract

We characterize the spatiotemporal deformation of an elastic film during the radial drainage of fluid from a narrowing gap. Elastic deformation of the film takes the form of a dimple and prevents full contact to be reached. With thinner elastic film the stress becomes increasingly supported by the underlying rigid substrate and the dimple formation is suppressed, which allows the surfaces to reach full contact. We highlight the lag due to viscoelasticity on the surface profiles, and that for a given fluid film thickness deformation leads to stronger hydrodynamic forces than for rigid surfaces.

11 pages, 4 figures

References in corpus (4)

• Unified study of glass and jamming rheology in soft particle systems
• Adhesive Contact to a Coated Elastic Substrate
• Coupled effects of applied load and surface structure on the viscous forces during peeling
• Elastic contact to nearly incompressible coatings -- Stiffness enhancement and elastic pile-up

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• Enhancement and Suppression of Active Particle Movement Due to Membrane Deformations