Yield drag in a two-dimensional foam flow around a circular obstacle: Effect of liquid fraction
Contribuinte(s) |
Institute of Mathematics & Physics (ADT) Mathematical Modelling of Structures, Solids and Fluids |
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Data(s) |
13/07/2007
13/07/2007
01/06/2007
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Resumo |
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) 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. Peer reviewed |
Formato |
22 |
Identificador |
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 . DOI: 10.1140/epje/i2006-10178-9 1292-8941 PURE: 72161 PURE UUID: 32f7c133-0a44-476e-a283-c961ca3a9853 dspace: 2160/321 |
Idioma(s) |
eng |
Relação |
European Physical Journal E |
Tipo |
/dk/atira/pure/researchoutput/researchoutputtypes/contributiontojournal/article |
Direitos |