Polymer properties

In progress

Viscosity

Compute the viscosity as a function of the temperature and the shear stress

 

: Melt viscosity (Pa.s)

: Shear stress

: activation energy of viscous-elastic flow under condition of = constant

R : gas constant in J/(mol.K)

T : temperature of experiment in K

B, b, s : Constants of the material (in this case : s=1/2)

How this code works ?

Classes

• Deck : get the value in viscosity.yaml
• Polymer : stock the values of deck concerning the polymer in variables that will be reuse
• Model : contain the equation to predict the viscosity
• Graph : calculate the data with the model, draw the graphic and save it in the folder Graphics

What the user have to do ?

• Adapt the values in the file viscosity.yaml :

Polymers:
  Name: 'PP Shell'
  Constant B: 1.5
  Constant b: 0.0043
  Activation Energy: 45522

Constants:
  Gas Constant: 8.314

Discretisation: 20

The Discretisation number is the number of points on the graphics.

• Install all required python packages listed in requirements.txt:

pip install -r requirements.txt

• The only file which need to be run is the main_viscosity.py. This script brings together all classes.

python main_viscosity.py

Surface tension