AI Article Synopsis
- Foam drainage is influenced by the type of surfactant used, affecting flow velocity profiles in Plateau borders, which are key for liquid movement within foams.
- Protein foams have a rigid interface, while small-surfactant foams exhibit more flexible interfacial properties.
- The study's findings support a model that considers how the liquid-gas interface behaves during flow, indicating that bubble size and liquid volume fraction play crucial roles in drainage behavior.
Article Abstract
Foam drainage varies with surfactant. We present direct measurements of the flow velocity profiles across single Plateau borders, which make up the interconnected channel-like network for liquid flow. For protein foams the interface is rigid, whereas small-surfactant foams show significant interfacial mobility. The results agree with a model that takes into account the shearing of the liquid-gas interface transverse to the flow direction. A significant consequence is that bubble size and liquid volume fraction in a foam affect the relative importance of surface rheology on the drainage behavior.
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| http://dx.doi.org/10.1103/PhysRevE.66.040601 | DOI Listing |
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