SHEAR-WAVE PROPAGATION AFTER STEPWISE INCREASE OF SHEAR RATE

被引：18

作者：

LEE, JS

FULLER, GG

机构：

[1] Department of Chemical Engineering, Stanford University, Stanford

来源：

JOURNAL OF NON-NEWTONIAN FLUID MECHANICS | 1991年 / 39卷 / 01期

基金：

美国国家科学基金会;

关键词：

FLOW BIREFRINGENCE; SHEAR WAVE; TRANSIENT COUETTE FLOW;

D O I：

10.1016/0377-0257(91)80001-Z

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Spatially resolved flow birefringence is used to investigate shear wave propagation in polymeric liquids following a step increase in boundary velocities. Under the same flow conditions and with suitable parameters, numerical calculations using the Giesekus constitutive equation are presented. Comparisons indicate good qualitative agreement in wave speeds and wave reflection phenomena for various combinations of initial and final boundary velocities. The results are also compared with recent data by Takahashi and co-workers on the effect of shear-rate changes on entanglement density in concentrated solutions.

引用

页码：1 / 15

页数：15

共 16 条

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