Journal
ROYAL SOCIETY OPEN SCIENCE
Volume 6, Issue 12, Pages -Publisher
ROYAL SOC
DOI: 10.1098/rsos.191608
Keywords
capillary bridge; capillary force; evaporation
Categories
Funding
- FNRS [CHAR.RECH.-1, B423.18]
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The surface properties between two non-miscible fluids are key elements to understand mass transfer, chemistry and biochemistry at interfaces. In this paper, surface properties are investigated in evaporating and non-evaporating conditions. A capillary bridge between two large plates (similar to a Hele-Shaw cell) is considered. The temporal evolution of surface forces and mass transfers due to evaporation of the liquid are measured. The force depends on surface properties of the substrate. It is adhesive in the wetting case and repulsive in the non-wetting case. The force is also shown to depend linearly on the volume of the capillary bridge F proportional to V-0 and inversely to the height of the bridge. Modelling is performed to characterize both surface force and evaporation properties of the capillary bridge. The evaporation is shown to be diffusion driven and is decoupled from the bridge mechanics.
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