CAJ | 학술논문

本文采用Oldroyd-B模型对弹性流体中线串珠结构的动力学进行数学模拟.相对于牛顿流体而言,非牛顿流体液丝破裂过程非常缓慢.这种缓慢的破裂过程为流体提供了充足的时间显现一些有趣的现象,例如液滴的排泄和移动.通过主要作用力的总合近似分析液丝拉伸过程中的受力情况.弹性力在弹性液丝动力学中起重要作用,它显著阻碍了液丝从拉伸到排泄的变化过程.
본문채용Oldroyd-B모형대탄성류체중선천주결구적동역학진행수학모의.상대우우돈류체이언,비우돈류체액사파렬과정비상완만.저충완만적파렬과정위류체제공료충족적시간현현일사유취적현상,례여액적적배설화이동.통과주요작용력적총합근사분석액사랍신과정중적수력정황.탄성력재탄성액사동역학중기중요작용,타현저조애료액사종랍신도배설적변화과정.
Numerical simulations on the dynamics of the filament-bead structure for elastic fluids were performed using Oldroyd-B model. The computed results agree with the well-known phenomenon that a non-Newtonian jet broke up much more slowly than a Newtonian one. The slower breakup process of elastic non-Newtonian fluid jet provided sufficient time for fluid to exhibit some interesting phenomena such as drop drainage and migration. The forces in the filament stretching could be approximated by the summation ofthe most important terms. The elastic force played an important role in the elastic jet dynamics. It significantly retarded the evolution of the filament from stretching to draining.