Wyn A, Davies IT, Cox SJ. Simulations of two-dimensional foam rheology: localization in linear Couette flow and the interaction of settling discs.
THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2008;
26:81-89. [PMID:
18404249 DOI:
10.1140/epje/i2007-10286-0]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2007] [Accepted: 01/31/2008] [Indexed: 05/26/2023]
Abstract
Surface Evolver simulations of flowing two-dimensional foams are described. These are used for two purposes. Firstly, to extract the location of the T 1s, the changes in bubble topology that occur during plastic flow. It is shown that in linear Couette flow the T1 s are localized in space, becoming more so as the polydispersity of the foam decreases. Secondly, the sedimentation of two circular discs through a foam under gravity is studied. If the discs are sufficiently close, they begin to interact and one moves behind the other during their descent.
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