A5072696795- Fluid Dynamics and Thin Films
- Fluid Dynamics and Heat Transfer
- Fluid Dynamics and Turbulent Flows
- Hydrology and Sediment Transport Processes
- Surface Modification and Superhydrophobicity
- Particle Dynamics in Fluid Flows
- Nanofluid Flow and Heat Transfer
- Rheology and Fluid Dynamics Studies
École Polytechnique Fédérale de Lausanne
2023-2024
Laboratoire Ondes et Matière d'Aquitaine
2021
Centre National de la Recherche Scientifique
2021
In turbulent rough-walled flows, the 2D friction-roughness relation differs from its 3D counterpart.
We study the drainage of a viscous liquid layer on horizontal cylinder under gravity, focusing cases where effects dominate inertia. Nonlinear simulations distinguish, as function film thickness and Bond number, two regimes draining either ruptures or forms quasistatic curtain. The curtain subsequently destabilizes due to capillary gravity forces. When surface tension dominates pearls form around cylinder, whereas when tension, hanging droplets form, confirmed by linear stability analysis
The present paper concerns the linear fate of transverse perturbations in a gravity-driven, thin-film flow over soluble substrate. We propose reduced-order model, based on boundary-layer treatment solute transport and depth-integration Stokes equations, using two extended lubrication methodologies found literature. obtain closed-form dispersion relation, which we compare to previous, fully resolved analytical investigation (Bertagni Camporeale, J. Fluid Mech. , vol. 913, 2021, A34). results...
We study the drainage of a viscous liquid film coating outside horizontal cylinder. first evolution axially invariant draining flow, initiated at rest with uniform thickness $\delta$. Non-linear simulations indicate that for each $\delta$, there is threshold in Bond number ($Bo$), which compares gravitational effects surface tension, above bulk ruptures. This critical $Bo$ found to scale inversely defining existence quasi-stationary pendant curtain sustained below cylinder by tension. The...