Pan Zhongcheng, Louvet Nicolas, Hennequin Yves, Kellay Hamid, Bonn Daniel
Soft Matter group, Van der Waals-Zeeman Institute, IoP, Science Park 904, Amsterdam, Netherlands.
Université de Bordeaux, Laboratoire Ondes et Matière d'Aquitaine CNRS UMR 5798, 351 cours de la Libération, 33405, Talence, France.
Phys Rev E Stat Nonlin Soft Matter Phys. 2015 Nov;92(5):052203. doi: 10.1103/PhysRevE.92.052203. Epub 2015 Nov 13.
We study droplet formation in granular suspensions by systematically varying the volume fractions (φ) and particle diameters (d). For suspensions with water as the suspending liquid, we find three different regimes. For dilute suspensions (φ≤45%), drop formation follows the predictions for inertial breakup and exhibits identical dynamics to that of pure water. The breakup is strongly asymmetrical in this case. Only for more concentrated suspensions (φ>45%) does the presence of particles change the dynamics and two other regimes, a symmetrical inertial regime and a Bagnoldian regime, are uncovered. We construct and discuss a phase diagram that allows us to understand and predict the breakup behavior in granular suspensions.
我们通过系统地改变体积分数（φ）和粒径（d）来研究颗粒悬浮液中的液滴形成。对于以水作为悬浮液的悬浮液，我们发现了三种不同的状态。对于稀悬浮液（φ≤45%），液滴形成遵循惯性破碎的预测，并且表现出与纯水相同的动力学。在这种情况下，破碎是强烈不对称的。只有对于浓度更高的悬浮液（φ>45%），颗粒的存在才会改变动力学，并且发现了另外两种状态，即对称惯性状态和巴格诺尔德状态。我们构建并讨论了一个相图，该相图使我们能够理解和预测颗粒悬浮液中的破碎行为。
