7.6.20.12.3. Bingham_Wlf

Syntax

Viscosity [{of} SpeciesName] = Bingham_Wlf [Mu_Zero = mu_zero | Mu_Inf = mu_inf | F = f | N = n | A = a | Lambda = lambda | Tau_Y = tau_y | Skip_Sensitivities = skip_sensitivities]

Scope

Aria Material

Summary

A viscosity model dependent on the shear rate \dot{\gamma}

\mu(\dot{\gamma}) = \mu_\infty + \left(\mu_\circ - \mu_\infty + \tau_y \frac{1 - e^{-\dot{\gamma} F}}{\dot{\gamma}}\right)\left(1 + \left(\lambda\dot{\gamma}\right)^a\right)^{\frac{n-1}{a}},

where \mu_\infty is the infinite shear viscosity, \mu_{\circ} is the zero shear viscosity, \lambda is a time constant, \tau_y is the yield stress, and F, a and n are additional model parameters.

Parameter

Value

Default

{of}

{of | species | subindex}

–

SpeciesName

string

–

mu_zero

real

–

mu_inf

real

–

f

real

–

n

real

–

a

real

–

lambda

real

–

tau_y

real

–

skip_sensitivities

integer

0