Journal
SOFT MATTER
Volume 10, Issue 36, Pages 6984-6989Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4sm00230j
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Funding
- ANR SYSCOMM
- Aquitaine Council
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We explore the question of surface boundary conditions for the flow of a dense emulsion. We make use of microlithographic tools to create surfaces with well controlled roughness patterns and measure using dynamic confocal microscopy both the slip velocity and the shear rate close to the wall, which we relate to the notion of surface fluidization. Both slippage and wall fluidization depend non-monotonously on the roughness. We interpret this behavior within a simple model in terms of the building of a stratified layer and the activation of plastic events by the surface roughness.
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