NLVE: General description

Purpose

Application to Analyze Start up of Nonlinear flow

Data Files

  • The first line of the file should contain the sample parameters separated by semi-colons (;). It may contain any number of parameters which will be read and saved as file-parameter in RepTate.

  • Then the data columns should appear, separated by spaces or tabs.

.shear extension

Text files with .shear extension should be organised as follows:

  • .shear files should provide parameter values for

    1. shear rate, \(\dot\gamma\)

    2. temperature, \(T\)

  • 2 columns separated by spaces or tabs containing respectively:

    1. time, \(t\),

    2. shear stress growth function, \(\sigma^+(t)\),

A correct .shear file looks like:

gdot=0.1;T=160;
2.50E-01 845
7.50E-01 1830
1.25E+00 2490
...      ...

.uext extension

Text files with .uext extension should be organised as follows:

  • .uext files should provide parameter values for

    1. Hencky strain rate, \(\dot\varepsilon\)

    2. temperature, \(T\)

  • 2 columns separated by spaces or tabs containing respectively:

    1. time, \(t\),

    2. tensile stress growth function, \(\sigma_E^+(t)\),

A correct .uext file looks like:

gdot=0.1;T=160;
2.50E-01 845
7.50E-01 1830
1.25E+00 2490
...      ...

Warning

The first line of the .uext file provides the flow rate as gdot=0.1, not edot=0.1

Views

log(eta(t))

BaseApplicationNLVE.viewLogeta()[source]

Logarithm of the transient shear or extensional viscosity (depending on the experiment) \(\eta(t)\) vs logarithm of time \(t\)

../../../_images/NLVE_logeta.png

eta(t)

BaseApplicationNLVE.vieweta()[source]

Transient shear or extensional viscosity (depending on the experiment) \(\eta(t)\) vs time \(t\) (both axes in logarithmic scale by default)

../../../_images/NLVE_eta.png

log(sigma(gamma))

BaseApplicationNLVE.viewLogSigmaGamma()[source]

Logarithm of the transient shear or extensional stress (depending on the experiment) \(\sigma(t)\) vs logarithm of the strain \(\gamma\)

../../../_images/NLVE_logsigmagamma.png

sigma(gamma)

BaseApplicationNLVE.viewSigmaGamma()[source]

Transient shear or extensional stress (depending on the experiment) \(\sigma(t)\) vs strain \(\gamma\)

../../../_images/NLVE_sigmagamma.png

log(sigma(t))

BaseApplicationNLVE.viewLogSigmaTime()[source]

Logarithm of the transient shear or extensional stress (depending on the experiment) \(\sigma(t)\) vs logarithm of time \(t\)

../../../_images/NLVE_logsigmat.png

sigma(t)

BaseApplicationNLVE.viewSigmaTime()[source]

Transient shear or extensional stress (depending on the experiment) \(\sigma(t)\) vs time \(t\)

../../../_images/NLVE_sigmat.png