Comparison of optical and mechanical measurements of second normal stress difference relaxation following step strain

1995 ◽  
Vol 34 (3) ◽  
pp. 221-234 ◽  
Author(s):  
Eric E. Brown ◽  
Wesley R. Burghardt ◽  
Hasan Kahvand ◽  
David C. Venerus
Keyword(s):  
Normal Stress ◽  
Normal Stress Difference ◽  
Stress Difference ◽  
Second Normal Stress Difference ◽  
Mechanical Measurements ◽  
Step Strain

First and second normal stress difference relaxation in reversing double‐step strain flows

1996 ◽  
Vol 40 (1) ◽  
pp. 37-54 ◽  
Author(s):  
E. F. Brown ◽  
Wesley R. Burghardt
Keyword(s):  
Normal Stress ◽  
Normal Stress Difference ◽  
Stress Difference ◽  
Double Step ◽  
Second Normal Stress Difference ◽  
Step Strain

scholarly journals On the Second Normal Stress Difference of Entangled Polymers.

1999 ◽  
Vol 27 (4) ◽  
pp. 251
Author(s):  
Tadashi INOUE ◽  
Kunihiro OSAKI
Keyword(s):  
Normal Stress ◽  
Normal Stress Difference ◽  
Stress Difference ◽  
Second Normal Stress Difference ◽  
Entangled Polymers

Suspensions in a tilted trough: second normal stress difference

2011 ◽  
Vol 686 ◽  
pp. 26-39 ◽  
Author(s):  
Étienne Couturier ◽  
François Boyer ◽  
Olivier Pouliquen ◽  
Élisabeth Guazzelli
Keyword(s):  
Shear Stress ◽  
Normal Stress ◽  
Volume Fraction ◽  
Behavioural Change ◽  
Normal Stress Difference ◽  
Stress Difference ◽  
Rigid Spheres ◽  
First Normal Stress Difference ◽  
Second Normal Stress Difference ◽  
Neutrally Buoyant

AbstractWe measure the second normal-stress difference in suspensions of non-Brownian neutrally buoyant rigid spheres dispersed in a Newtonian fluid. We use a method inspired by Wineman & Pipkin (Acta Mechanica, vol. 2, 1966, pp. 104–115) and Tanner (Trans. Soc. Rheol., vol. 14, 1970, pp. 483–507), which relies on the examination of the shape of the suspension free surface in a tilted trough flow. The second normal-stress difference is found to be negative and linear in shear stress. The ratio of the second normal-stress difference to shear stress increases with increasing volume fraction. A clear behavioural change exhibiting a strong (approximately linear) growth in the magnitude of this ratio with volume fraction is seen above a volume fraction of 0.22. By comparing our results with previous data obtained for the same batch of spheres by Boyer, Pouliquen & Guazzeli (J. Fluid Mech., 2011, doi:10.1017/jfm.2011.272), the ratio of the first normal-stress difference to the shear stress is estimated and its magnitude is found to be very small.

A normal stress amplifier for the second normal stress difference

1980 ◽  
Vol 6 (3-4) ◽  
pp. 325-331 ◽  
Author(s):  
Leroy D. Sturges ◽  
Daniel D. Joseph
Keyword(s):  
Normal Stress ◽  
Normal Stress Difference ◽  
Stress Difference ◽  
Second Normal Stress Difference

A comparison of the rheology of two polymeric and two micellar systems. Part II: Second normal stress difference

1975 ◽  
Vol 14 (1) ◽  
pp. 61-70 ◽  
Author(s):  
H. A. Barnes ◽  
A. R. Eastwood ◽  
B. Yates
Keyword(s):  
Normal Stress ◽  
Normal Stress Difference ◽  
Stress Difference ◽  
Second Normal Stress Difference ◽  
Micellar Systems
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