Index

Mixed dependence

Ver: 1   DESCRIPTION For a generalized Newtonian fluid, the constitutive equation has the form

S = 2 * eta * D

  where S is the extra-stress tensor, D is the rate of deformation tensor, and eta is the viscosity.   For the Mixed dependence law, the function eta is written as follows :   eta = F(g) H(T,g)

with

F(g) = fac * 10**( a0 + a1 * log(g/gcrit) + a11 * log(g/gcrit)**2 )
H(T,g) = 10**( a2 * (t-t0) + a22 * (t-t0)**2 + a12 * (t-t0) * log(g/gcrit) )


This menu allows the user to modify the parameters of the H function.

By default, t0 = 0 and a2 = a22 = a12 = 0.

  OPTIONS
 
 -1   Upper level menu
  1   Modify  a2    = 0.0000000E+00
  2   Modify  a22   = 0.0000000E+00
  3   Modify  a12   = 0.0000000E+00
  4   Modify  t0    = 0.0000000E+00
NOTES The Mixed dependence is not available if the 'Log-log' law for the shear-rate dependence has not been chosen

The units for a2, a22 and a12 and t0 are :
 
 parameter
mass
length
time
temperature
t0
-
-
-
 1
a2, a22, a12
-
-
-
 -

SEE ALSO