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.

The shear-rate dependence of the viscosity is denoted by a function F(g), where g is the shear-rate.

For the Cross law, the function F(g) is written as follows :

F(g) = fac / [ 1 + (tnat *g)^expom]

where fac is the zero shear-rate viscosity, tnat is a time scale, and expom is a power index.

By default, fac = 1, and tnat = 0 and expom = 0.

OPTIONS

 

-1	Upper level menu
1	Modify  fac    = 1.0000000E+00
2	Modify  tnat   = 0.0000000E+00
3	Modify  expom  = 0.0000000E+00

• generalized Newtonian fluids (UM)
• continuum equations (UM)
• shear-rate dependence of viscosity
• evolution (UM)
• s-dependence
• create a new task
• system of units