Courbin Laurent, Panizza Pascal, Salmon Jean-Baptiste
Centre de Physique Optique Moléculaire Hertzienne, UMR 5798, 351 Cours de la Libération, 33400 Talence, France.
Phys Rev Lett. 2004 Jan 9;92(1):018305. doi: 10.1103/PhysRevLett.92.018305.
Experimental observations of droplet size sustained oscillations are reported in a two-phase flow between a lamellar and a sponge phase. Under shear flow, this system presents two different steady states made of monodisperse multilamellar droplets, separated by a shear-thinning transition. At low and high shear rates, the droplet size results from a balance between surface tension and viscous stress, whereas for intermediate shear rates it becomes a periodic function of time. A possible mechanism for such kinds of oscillations is discussed.
本文报道了层状相和海绵相之间两相流中液滴尺寸持续振荡的实验观察结果。在剪切流作用下，该系统呈现出由单分散多层液滴构成的两种不同稳态，它们由剪切变稀转变分隔开。在低剪切速率和高剪切速率下，液滴尺寸由表面张力和粘性应力之间的平衡决定，而在中等剪切速率下，它成为时间的周期函数。文中讨论了此类振荡的一种可能机制。
