Index

Evolutive viscosity

Ver: 3
 

DESCRIPTION

Modifies the value of the evolutive viscosity in integral viscoelastic sub-tasks.
This menu is available only under an evolution task. OPTION
 
-1
 Upper level menu
The current values are accepted
1
 Modification of the evolutive viscosity
Default value: sum of the partial viscosities
2'
 Evolution on the evolutive viscosity
Available when the current task is an evolution problem.
Enables the evolution on the evolutive viscosity.
2"
 No evolution on the evolutive viscosity
Available when the current task is an evolution problem.
Disables the evolution on the evolutive viscosity.
3'
 Switch to Variable Evolutive Viscosity
Defines an evolutive viscosity which presents the same dependence on the shear-rate as the integral fluid model itself.
3"
 Switch to Constant Evolutive Viscosity
Defines a constant evolutive viscosity (independent of shear-rate)
NOTES The units for additional viscosity are :
 
 parameter
mass
length
time
temperature
evol. visc.
1
-1
-1
 -
  Usually, an integral viscoelastic problem is too non-linear to be solved in one in one step.
So, an evolution problem is defined in order to pass from a Newtonian problem to a viscoelastic problem.
This evolution scheme is made on the so-called evolutive viscosity.
The parameters of this evolution scheme are not accessible to the user.   SEE ALSO