Numerical predictions of bubble growth in viscoelastic stretching filaments
Numerical predictions of bubble growth in viscoelastic stretching filaments
复制标题
粘弹性拉伸长丝中气泡生长的数值预测
DOI:
10.1007/s00397-010-0493-2
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发表时间:
2010
期刊:
影响因子:
2.3
通讯作者:
Sujatha K
中科院分区:
文献类型:
--
作者:
Sujatha K
In this study, we investigate the growth of bubbles within predominately extensional-deformation flows of thin film stretching form. This involves more than one free-surface to the flow (multiple surfaces), typically as inner (bubble) and outer (filament) boundaries that introducesfluid–gas interfacialtreatment. Various bubble initial states and locations may be considered. The problem is discretised in space–time through a hybrid-finite element/volume pressure-correction formulation, coupled with an arbitrary Lagrangian–Eulerian (ALE) coupled with VOF scheme to track domain-mesh and free-surface movement. We contrast these results against the results from a complete ALE algorithm. Various fluid-filament materials have been considered, covering such properties as constant viscosity fluids (Newtonian), low-polymeric/high-solvent viscosity Boger-type (Oldroyd-B) fluids and high-polymeric/low-solvent viscosity elastic-type fluids (Oldroyd-B and Phan-Thien/Tanner). Numerical solutions are presented in terms of comparison between algorithms (ALE versus hybrid ALE/VOF), shapes (bubble shapes, filament shapes), contours of extra-stress (magnitude and location), mid-filament radius and extensional viscosity.
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