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))

ApplicationNLVE.viewLogeta()

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

eta(t)

ApplicationNLVE.vieweta()

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

log(sigma(gamma))

ApplicationNLVE.viewLogSigmaGamma()

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

sigma(gamma)

ApplicationNLVE.viewSigmaGamma()

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

log(sigma(t))

ApplicationNLVE.viewLogSigmaTime()

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

sigma(t)

ApplicationNLVE.viewSigmaTime()

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