Université Paris 6, UMR 7588 CNRS-UPMC, INSP, 4 place Jussieu, 75252 Paris cedex 05, France.
Phys Rev Lett. 2012 May 4;108(18):188301. doi: 10.1103/PhysRevLett.108.188301. Epub 2012 May 2.
We investigate the dynamics of bubble rearrangements in coarsening foams, using a time-resolved multiple light scattering technique. We measure the average duration of such events as a function of the foam confinement pressure. Rearrangements slow down as the pressure is decreased toward the jamming point. Our results are explained by a scaling law based on the balance of pressure and Darcy flow, highlighting an analogy between wet foams with mobile interfaces and suspensions of hard grains.
我们使用时间分辨多散射技术研究了粗化泡沫中气泡重新排列的动力学。我们测量了这些事件的平均持续时间作为泡沫约束压力的函数。随着压力向阻塞点降低，重新排列的速度减慢。我们的结果可以用基于压力和达西流平衡的标度定律来解释，突出了具有可移动界面的湿泡沫和硬颗粒悬浮液之间的类比。
