Yield drag in a two-dimensional foam flow around a circular obstacle: Effect of liquid fraction

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dc.contributor.author Raufaste, Christophe
dc.contributor.author Dollet, Benjamin
dc.contributor.author Cox, Simon
dc.contributor.author Jiang, Yi
dc.contributor.author Graner, François
dc.date.accessioned 2007-07-13T14:08:37Z
dc.date.available 2007-07-13T14:08:37Z
dc.date.issued 2007-06
dc.identifier.citation Raufaste , C , Dollet , B , Cox , S , Jiang , Y & Graner , F 2007 , ' Yield drag in a two-dimensional foam flow around a circular obstacle: Effect of liquid fraction ' European Physical Journal E , vol 23 , no. 2 , pp. 217-228 . en
dc.identifier.issn 1292-8941
dc.identifier.other PURE: 72161
dc.identifier.other dspace: 2160/321
dc.identifier.uri http://hdl.handle.net/2160/321
dc.description Raufaste, C., Dollet, B., Cox, S., Jiang, Y. and Graner, F. (2007). Yield drag in a two-dimensional foam flow around a circular obstacle: Effect of liquid fraction. European Physical Journal E, 23 (2), 217–228 Sponsorship: Y.J. is supported by US DOE under contract No. DE-AC52-06NA25396. S.C. is supported by EPSRC (EP/D071127/1) en
dc.description.abstract We study the two-dimensional flow of foams around a circular obstacle within a long channel. In experiments, we confine the foam between liquid and glass surfaces. In simulations, we use a deterministic software, the Surface Evolver, for bubble details and a stochastic one, the extended Potts model, for statistics. We adopt a coherent definition of liquid fraction for all studied systems. We vary it in both experiments and simulations, and determine the yield drag of the foam, that is, the force exerted on the obstacle by the foam flowing at very low velocity. We find that the yield drag is linear over a large range of the ratio of obstacle to bubble size, and is independent of the channel width over a large range. Decreasing the liquid fraction, however, strongly increases the yield drag; we discuss and interpret this dependence. en
dc.format.extent 22 en
dc.language.iso eng
dc.relation.ispartof European Physical Journal E en
dc.title Yield drag in a two-dimensional foam flow around a circular obstacle: Effect of liquid fraction en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1140/epje/i2006-10178-9
dc.contributor.institution Institute of Mathematics & Physics (ADT) en
dc.contributor.institution Mathematical Modelling of Structures, Solids and Fluids en
dc.description.status Peer reviewed en


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