Foams in a rotating drum: An analogy with granular materials
Foams in a rotating drum: An analogy with granular materials
复制标题
转鼓中的泡沫：与颗粒材料的类比
DOI：
10.1016/j.colsurfa.2015.01.006
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
H. Caps
中科院分区：
文献类型：
--
作者：
Ariane Bronfort;H. Caps
转鼓通常用于研究颗粒物料的流动特性。在这里，我们报告了在由圆形 Hele-Shaw 单元制成的鼓中进行的实验，鼓中填充有单分散泡沫及其表面活性剂溶液。细胞垂直放置并绕其中心以角速度 ω 旋转。泡孔的旋转改变了泡沫的特性，从而影响其对外部应变的响应。观察到的泡沫行为在几个方面与颗粒介质相似。使用为颗粒材料开发的工具，我们以无量纲粘性数来表征泡沫的演变，并将泡沫流变学与为浸没颗粒材料流变学开发的理论进行比较。
Rotating drums are usually used to study the flowing properties of granular materials. Here, we report experiments performed in a drum made of a circular Hele–Shaw cell filled with a monodisperse foam and its surfactant solution. The cell is placed vertically and rotated around its center with an angular velocityω. The rotation of the cell modifies the foam properties and therefore influences its response to the external strain. The observed foam behavior is similar to granular media in several aspects. Using tools developed for granular materials, we characterize the foam evolution in terms of a dimensionless viscous numberIfand we compare the foam rheology to the theory developed for the immersed granular material rheology.