论文标题
剪切稀释液滴的次级分解的数值模拟
Numerical simulation of secondary breakup of shear-thinning droplets
论文作者
论文摘要
在许多应用中，非牛顿液滴的破裂是无处不在的。尽管非牛顿特性可以显着改变液滴分解过程，但大多数先前的研究都考虑了牛顿液滴，而非牛顿特性对分解过程的影响仍不清楚。这项研究的重点是通过数值模拟的剪切滴液滴的次级破裂。流体方法的体积用于捕获自适应网格上的接口动力学。为了比较剪切稀释的液滴和牛顿液滴，通过考虑气流引起的液滴中的特征剪切速率，提出了Ohnesorge编号的新定义。结果表明，与牛顿液相比，剪切稀释的特性可以改变液滴内部的有效粘度分布，改变局部变形，改变液滴形态并影响液滴破裂状态中的过渡。
The breakup of non-Newtonian droplets is ubiquitous in numerous applications. Although the non-Newtonian property can significantly change the droplet breakup process, most previous studies consider Newtonian droplets, and the effects of the non-Newtonian properties on the breakup process are still unclear. This study focuses on the secondary breakup of shear-thinning droplets by numerical simulation. The volume of fluid method is used to capture interface dynamics on adaptive grids. To compare shear-thinning droplets and Newtonian droplets, a new definition of the Ohnesorge number is proposed by considering the characteristic shear rate in the droplet induced by the airflow. The results show that compared with the Newtonian fluid, the shear-thinning properties can change the effective viscosity distribution inside the droplet, alter the local deformation, change the droplet morphology, and affect the transition in the droplet breakup regime.
