Thixotropic viscosity model based on the evolution of the structural parameter $\lambda$ : More...

Detailed Description

Thixotropic viscosity model based on the evolution of the structural parameter $\lambda$ :

$\lambda = a(1 - \lambda)^b - c \lambda \dot{\gamma}^d$

The viscosity is then calculated using the expression

$\mu = \frac{\mu_{\infty}}{{1 - K \lambda}^2}$

Where the parameter K is given by:

$K = 1 - \sqrt{\frac{\mu_{\infty}}{\mu_{0}}}$

Here:

$\lambda$	=	structural parameter
	=	model coefficient
	=	model coefficient
	=	model coefficient
	=	model coefficient
$\dot{\gamma}$	=	stress rate [1/s]
$\mu_{0}$	=	limiting viscosity when $\lambda = 1$
$\mu_{\infty}$	=	limiting viscosity when $\lambda = 0$

Reference:

        Barnes H A, 1997.  Thixotropy - a review.  J. Non-Newtonian Fluid
        Mech 70, pp 1-33

Source files

The documentation for this class was generated from the following file:

src/regionModels/surfaceFilmModels/submodels/thermo/filmViscosityModel/thixotropicViscosity/thixotropicViscosity.H