论文标题
电击引起的聚合物液滴的Alobreakup
Shock induced aerobreakup of a polymeric droplet
论文作者
论文摘要
在各种自然和工业过程中，通过Alobreakup通过Alobreakup的液滴雾化是无处不在的。牛顿液滴的雾化是一个充分研究的地区。但是，尽管频繁遇到遇到的非牛顿液滴，但牛顿液滴的关注较少。通过将不同浓度的聚合物液滴放在运动冲击波后面的诱导气流中，我们探讨了弹性在调节粘弹性液滴的Alobreakup中的作用。针对广泛的Weber编号（$ \ sim 10^2-10^4 $）和弹性编号（$ \ sim 10^{ - 4} -10^2 $）变体的三种不同模式的Aerobreakup。这些模式是：振动，剪切引起的夹带和灾难性分解模式。每个模式都被描述为三阶段过程。 I阶段是液滴变形，第三阶段是流体动力学不稳定性的外观和生长，III阶段是液体质量形态的进化。据观察，弹性在前两个阶段起着微不足道的作用，但在最后阶段起主要作用。在足够的数学分析的支持下描述了结果。
Droplet atomization through aerobreakup is omnipresent in various natural and industrial processes. Atomization of Newtonian droplets is a well-studied area; however, non-Newtonian droplets have received less attention despite their frequent encounters. By subjecting polymeric droplets of different concentrations to the induced airflow behind a moving shock wave, we explore the role of elasticity in modulating the aerobreakup of viscoelastic droplets. Three distinct modes of aerobreakup are identified for a wide range of Weber number ($\sim 10^2-10^4$) and Elasticity number ($\sim 10^{-4}-10^2$) variation; these modes are: vibrational, shear-induced entrainment and catastrophic breakup mode. Each mode is described as a three stage process. Stage-I is the droplet deformation, stage-II is the appearance and growth of hydrodynamic instabilities, and stage-III is the evolution of liquid mass morphology. It is observed that elasticity plays an insignificant role in the first two stages, but a dominant role in the final stage. The results are described with the support of adequate mathematical analysis.
