2ND NORMAL STRESS DIFFERENCE OF A BOGER FLUID

被引：67

作者：

MAGDA, JJ ^{[1
]}

LOU, J ^{[1
]}

BAEK, SG ^{[1
]}

DEVRIES, KL ^{[1
]}

机构：

[1] UNIV UTAH,DEPT MECH ENGN,SALT LAKE CITY,UT 84112

来源：

POLYMER | 1991年 / 32卷 / 11期

基金：

美国国家科学基金会;

关键词：

RHEOLOGY; POLYISOBUTYLENE; MODEL ELASTIC FLUID; ROD-CLIMBING; 2ND NORMAL STRESS DIFFERENCE;

D O I：

10.1016/0032-3861(91)90165-F

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Measurement of the second normal stress difference for a highly elastic, constant viscosity 'Boger fluid' is reported. Two very different experimental techniques have been used: (1) measurement of the height of the free surface in rod-climbing flow; (2) measurement of the pressure distribution in cone-and-plate shearing flow. The second normal stress difference is at least 30 times smaller in magnitude than the first normal stress difference, and opposite in sign. The results should prove useful in distinguishing between the various constitutive equations proposed for Boger fluids.

引用

页码：2000 / 2009

页数：10

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