Pearling Instabilities of a Viscoelastic Thread

被引：52

作者：

Deblais, A. ^{[1
]}

Velikov, K. P. ^{[1
,2
]}

Bonn, D. ^{[1
]}

机构：

[1] Univ Amsterdam, Inst Phys, Van der Waals Zeeman Inst, NL-1098 XH Amsterdam, Netherlands

[2] Unilever Res Labs, Olivier van Noortlaan 120, NL-3133 AT Vlaardingen, Netherlands

来源：

PHYSICAL REVIEW LETTERS | 2018年 / 120卷 / 19期

关键词：

POLYMER-SOLUTIONS; BREAKUP; FLUIDS; DYNAMICS; FLOW;

D O I：

10.1103/PhysRevLett.120.194501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Pearling instabilities of slender viscoelastic threads have received much attention, but remain incompletely understood. We study the instabilities in polymer solutions subject to uniaxial elongational flow. Two distinctly different instabilites are observed: beads on a string and blistering. The beads-on-a-string structure arises from a capillary instability whereas the blistering instability has a different origin: it is due to a coupling between stress and polymer concentration. By varying the temperature to change the solution properties we elucidate the interplay between flow and phase separation.

引用

页数：5

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