Drainage of single Plateau borders: Direct observation of rigid and mobile interfaces

Koehler, Stephan A. and Hilgenfeldt, Sascha and Weeks, Eric R. and Stone, Howard A. (2002) Drainage of single Plateau borders: Direct observation of rigid and mobile interfaces. Physical Review E: Statistical, nonlinear, and soft matter physics, 66 (4). ISSN 1539-3755

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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.
Item Type:	Article
Copyright:	© 2002 The American Physical Society
Research Group:	Physics of Fluids (POF)
Link to this item:	http://purl.utwente.nl/publications/44338
Official URL:	http://dx.doi.org/10.1103/PhysRevE.66.040601
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Metis ID: 208930