Elongational flow behavior of viscoelastic liquids: Part I. Modeling of bubble collapse
Elongational flow behavior of viscoelastic liquids: Part I. Modeling of bubble collapse
复制标题
粘弹性液体的拉伸流动行为：第一部分：气泡破裂的建模
DOI：
10.1002/aic.690230513
复制
发表时间：
1977
期刊：
影响因子：
3.7
通讯作者：
S. Middleman
中科院分区：
文献类型：
--
作者：
G. Pearson;S. Middleman
球形塌陷的气泡将产生其周围流体的单轴延伸。这种流动可以很容易地进行分析，并且可以将观察到的实验参数（例如气泡内的压力和气泡破裂速率）与粘弹性本构关系的预测联系起来。本研究比较了牛顿流体和粘弹性模型的预测，以观察三种流体中的气泡破裂：一种牛顿流体和两种粘弹性聚合物溶液。牛顿实验观察到数据和模型之间具有良好的一致性。然而，粘弹性解决方案产生的塌陷率大于基于相等零剪切粘度的牛顿预测。随后使用改进的共旋麦克斯韦流体进行的建模与粘弹性溶液中瞬态伸长响应的数据非常一致。
A spherically collapsing gas bubble will create a uniaxial extension of the fluid surrounding it. This flow may be readily analyzed, and it is possible to relate observed experimental parameters such as the pressure inside the bubble and the bubble collapse rate to the predictions of viscoelastic constitutive relations. This study compares the predictions of the Newtonian fluid and a viscoelastic model to observed bubble collapse in three fluids: one Newtonian fluid and two viscoelastic polymer solutions. Good agreement between data and the model was observed for the Newtonian experiments. The viscoelastic solutions, however, yielded rates of collapse which were greater than the Newtonian predictions based on equal zero-shear viscosity. Subsequent modeling with a modified corotational Maxwell fluid yielded good agreement with the data for the transient elongational response in the viscoelastic solutions.