Observations of a variety of drainage patterns in bamboo foamsV. Carrier, S. Hutzler and D. Weaire
School of Physics, Trinity College Dublin - Dublin 2, Ireland
received 9 November 2007; accepted in final form 18 July 2008; published September 2008
published online 2 September 2008
We have explored the patterns of drainage in a bamboo foam, i.e. a foam consisting of an arrangement of parallel soap films with equidistant spacing. We find an intriguing variety of such patterns, both static and dynamic. All involve the formation of drainage channels at the wall of the column, which are variously arranged and in some cases rotating and oscillating.
47.54.-r - Fluid dynamics: Pattern selection; pattern formation.
47.20.Ky - Flow instabilities: Nonlinearity, bifurcation, and symmetry breaking.
82.70.Rr - Aerosols and foams.
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