Nonlinear elastic polymers in random flow

被引：35

作者：

Afonso, MM

Vincenzi, D

机构：

[1] Univ Genoa, Dipartimento Fis, INFM, I-16146 Genoa, Italy

[2] Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy

[3] Max Planck Inst Dyanm & Selbstorg, Gottingen, Germany

[4] Cornell Univ, LASSP, Ithaca, NY 14853 USA

来源：

JOURNAL OF FLUID MECHANICS | 2005年 / 540卷

关键词：

D O I：

10.1017/S0022112005005951

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Polymer stretching in random smooth flows is investigated within the framework of the FENE dumbbell model. The advecting flow is Gaussian and short-correlated in time. The stationary probability density function of polymer extension is derived exactly. The characteristic time needed for the system to attain the stationary regime is computed as a function of the Weissenberg number and the maximum length of polymers. The transient relaxation to the stationary regime is predicted to be exceptionally slow in the proximity of the coil-stretch transition.

引用

页码：99 / 108

页数：10

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