Wetting Failure in Fluid-Fluid Displacement

air film Air Liquid Wetting Failure in Fluid-Fluid Displacement ... Wetting failure results when viscous forces overwhelm surface tension forces ...
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Wetting Failure in Fluid-Fluid Displacement Air

Liquid air film

U Steady

UU Failure

• Meniscus confinement delays wetting failure to higher speeds • Hydrodynamic models describe experimental observations • Wetting failure results when viscous forces overwhelm surface tension forces • Results provide an explanation for the success of “bead coating” methods