scholarly journals Evaluating the exit pressure method for measurements of normal stress difference at high shear rates

2020 ◽  
Vol 64 (3) ◽  
pp. 739-750 ◽  
Author(s):  
Dahang Tang ◽  
Flávio H. Marchesini ◽  
Ludwig Cardon ◽  
Dagmar R. D’hooge
Keyword(s):  
Normal Stress ◽  
Normal Stress Difference ◽  
High Shear ◽  
Stress Difference ◽  
Shear Rates ◽  
Pressure Method ◽  
Exit Pressure ◽  
High Shear Rates

An appraisal of the exit pressure method for normal stress measurements

1985 ◽  
Vol 5 (2) ◽  
pp. 173-182 ◽  
Author(s):  
J. Vlachopoulos ◽  
E. Mitsoulis
Keyword(s):  
Normal Stress ◽  
Fluid Model ◽  
Normal Stress Difference ◽  
Creeping Flow ◽  
Stress Difference ◽  
First Normal Stress Difference ◽  
Flow Equations ◽  
Pressure Method ◽  
Exit Pressure

Abstract A numerical experiment has been carried out to assess the errors involved in using Han’s exit pressure method for the determination of the first normal stress difference with a slit die. The creeping flow equations for a viscoelastic fluid model have been solved using the finite element method. The calculated exit pressures are used in the determination of normal stresses and are compared to those obtained directly from the constitutive model. The results show that the exit pressure method gives reasonably accurate estimates of the first normal stress difference.

Simulation Study of Thermotropic LCPs and Prediction of Normal Stress Difference at High Shear Rate

2013 ◽  
Vol 28 (5) ◽  
pp. 470-482 ◽  
Author(s):  
A. Rahman ◽  
R. K. Gupta ◽  
S. N. Bhattacharya ◽  
S. Ray ◽  
F. Costa
Keyword(s):  
Shear Rate ◽  
Normal Stress ◽  
Simulation Study ◽  
Normal Stress Difference ◽  
High Shear Rate ◽  
High Shear ◽  
Stress Difference

Primary normal-stress coefficient prediction at high shear rates

1988 ◽  
Vol 27 (6) ◽  
pp. 567-574 ◽  
Author(s):  
Chr Friedrich ◽  
L. Heymann
Keyword(s):  
Normal Stress ◽  
High Shear ◽  
Shear Rates ◽  
High Shear Rates ◽  
Stress Coefficient
Sign in / Sign up

Export Citation Format

Share Document