Viscosity Model

Carreau-Yasuda Model

The 5-parameter model implemented in the solver known as Carreau-Yasuda Model is given by:


Zero Shear Viscosity

  • Units: Pa-s
  • Keyword: ZeroShearViscosity
  • Description: Viscosity of the polymer at min shear rate. This model is characterized by a plateau as the shear rate tends to 0.

Infinite Shear Viscosity

  • Units: Pa-s
  • Keyword: InfiniteShearViscosity
  • Description: Viscosity of the polymer at max shear rate. This model is characterized by a plateau as the shear rate tends to a large value.

Time Constant

  • Units: seconds
  • Keyword: TimeConstant (\lambda)
  • Description: A parameter in the Carreau-Yasuda Model.

Transition Parameter

  • Units: None
  • Keyword: TransitionParameter (a)
  • Description: Describes the Power-law behavior of the Carreau-Yasuda Model.

Power Law Index (Exponent)

  • Units: None
  • Keyword: PowerLawIndex
  • Description: Describes the Power-law behavior of the Carreau-Yasuda Model.

Zero Shear Constant

  • Units: None
  • Keyword: ZeroShearConstant
  • Description: Not a formal parameter of the Carreau-Yasuda Model and its value is always 1.0.