****************** Low Rate Viscosity ****************** :: Low Rate Viscosity = CONSTANT [M/Lt] ----------------------- **Description / Usage** ----------------------- This card is used to specify the model for the low-rate viscosity parameter for the **POWER_LAW, CARREAU, CARREAU_WLF, BINGHAM, SUSPENSION,** **THERMAL, CURE, EPOXY, FILLED_EPOXY, POWERLAW_SUSPENSION** and **CARREAU_SUSPENSION** model options of the *Liquid Constitutive Equation* card. This is also the reference viscosity value in the **HERSCHEL_BULKLEY** constitutive equation. Definitions of the input parameters are as follows: +-----------------+----------------------------------------------------------------------------------------------------+ |**CONSTANT** |Name of the model for the low-rate viscosity. | | | | | | * - the value of the low-rate viscosity. This value is also called the zero strain-rate | | | limit of the viscosity and in models is normally called μ0. | +-----------------+----------------------------------------------------------------------------------------------------+ |**LEVEL_SET** |Name of the model for level-set dependent low-rate viscosity. Allows for this viscosity level to be | | |a function of the level-set field. Specifically used for changing the low-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: | | | | | | * - the value of viscosity in the negative regions of the level set function. | | | * - the value of viscosity in the positive regioons of the level-set function. | | | * 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. | +-----------------+----------------------------------------------------------------------------------------------------+ ------------ **Examples** ------------ The following is a sample card that sets the low rate viscosity to 10: :: Low Rate Viscosity = CONSTANT 10. ------------------------- **Technical Discussion** ------------------------- See Description/Usage for *Liquid Constitutive Equation* card. -------------- **References** -------------- No References.