High Rate Viscosity#

High Rate Viscosity = CONSTANT <float> [M/Lt]

Description / Usage#

This card is used to specify the model for the high-rate viscosity parameter of the CARREAU, BINGHAM, CARREAU_WLF and CARREAU_SUSPENSION fluid options of the Liquid Constitutive Equation card. Definitions of the input parameters are as follows:


Name of the model for the high-rate viscosity.

  • <float> - the value of the high-rate viscosity. This value is normally called ╬╝inf in models.


Name of the model for level-set dependent high-rate viscosity. Allows for this viscosity level to be a function of the level-set field. Specifically used for changing the high-rate viscosity from one constant value on the negative side of the interface to another constant value on the positive side. The model requires three floats:

  • <float1> - the value of viscosity in the negative regions of the level set function.

  • <float2> - the value of viscosity in the positive regioons of the level-set function.

  • <float3> Length scale over which the transition occurs. If this parameter is set to zero, it will default to one-half the Level-Set Length Scale value specified.


The following is a sample card that sets the high rate viscosity to 10.:

High Rate Viscosity = CONSTANT 10.

Technical Discussion#

See Description/Usage for Liquid Constitutive Equation card.


No References.