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Article Dans Une Revue Physical Review Letters Année : 2010

Coarsening Foams Robustly Reach a Self-Similar Growth Regime

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Dry liquid foams coarsen like other diphasic systems governed by interfacial energy: gas slowly diffuses across liquid films, resulting in large bubbles growing at the expense of smaller ones which eventually shrink and disappear. A foam scatters light very effectively, preventing direct optical observation of bubble sizes and shapes in large foams. Using high speed x-ray tomography, we have produced 4D movies (i.e., 3D+time) of up to 30 000 bubbles. After a transient regime, the successive images look alike, except that the average bubble size increases as the square root of time: This scaling state is the long sought self-similar growth regime. The bubble size and face-number distributions in this regime are compared with experimental distributions for grains in crystals and with numerical simulations of foams.
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hal-00658728 , version 1 (11-01-2012)

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Jérôme Lambert, Rajmund Mokso, Isabelle Cantat, Peter Cloetens, James A. Glazier, et al.. Coarsening Foams Robustly Reach a Self-Similar Growth Regime. Physical Review Letters, 2010, 104 (24), pp.248304. ⟨10.1103/PhysRevLett.104.248304⟩. ⟨hal-00658728⟩
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