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arXiv 1902.07076cond-mat.soft
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泡沫膜间通过界面传递的动力耦合

Dynamical coupling between connected foam films by interface transfer across the menisci

Adrien Bussonnière, Evgenia Shabalina, Xavier Ah-Thon, Mickaël Le Fur, Isabelle Cantat

摘要:

捕获在气泡之间的液相的高度受限的流动是液体泡沫的大有效粘度的起源。尽管这种复杂流体的工业相关性,泡沫粘度仍然难以预测,因为缺乏在气泡尺度下的流动特性。使用一个原始的可变形框架,我们提供了第一个实验证据的界面之间的转移压缩膜(分别。拉伸的膜)和其第一相邻膜,穿过它们共同的弯月面。我们测量这个转移速度,这是一个关键的边界条件,在泡沫中的局部流动。我们还显示了戏剧性的膜厚变化引起的界面转移,这可能会发挥重要作用的膜厚分布的三维泡沫样品。

英文摘要:

The highly confined flow of the liquid phase, trapped between the gas bubbles, is at the origin of the large effective viscosity of the liquid foams. Despite the industrial relevance of this complex fluid, the foam viscosity remains difficult to predict, because of the lack of flow characterization at the bubble scale. Using an original deformable frame, we provide the first experimental evidence of the interface transfer between a compressed film (resp. a stretched film) and its first neighbour, across their common meniscus. We measure this transfer velocity, which is a key boundary condition for local flows in foams. We also show the dramatic film thickness variation induced by this interface transfer, which may play an important role in the film thickness distribution of a 3D foam sample.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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