**************** Thermal Exponent **************** :: Thermal Exponent = CONSTANT [T] ----------------------- **Description / Usage** ----------------------- This card is used to specify a thermal exponential factor for **CARREAU_WLF, BINGHAM, THERMAL, EPOXY, FILLED_EPOXY, POWERLAW_SUSPENSION** and **CARREAU_SUSPENSION** viscosity models, as selected in the *Liquid Constitutive Equation* card. The value represented by the thermal exponent varies between these liquid constitutive models; the appropriate values for each model is indicated below. Definitions of the input parameters are as follows: +-----------------+------------------------------------------------------------------------------------------------------------+ |**CONSTANT** |Name of the model for the thermal exponent. | | | | | | * - the value of the thermal exponent for the viscosity model specified in the *Liquid Constitutive| | | Equation* card. | | | | | | * for the **BINGHAM, THERMAL, EPOXY,** or **FILLED_EPOXY** model, | | | | | | * - the Eμ/R parameter. This has the dimensions of temperature in whatever units are consistent | | | with the problem and describes the thinning of viscosity with temperature. | | | | | | * for the **CARREAU_WLF** model model, | | | | | | * - the c1 constant of the equation for the temperature-dependent shift factor. | | | | | | * for the **POWERLAW_SUSPENSION** or **CARREAU_SUSPENSION** model, | | | | | | * - the exponent for the Krieger viscosity model, *m*. | +-----------------+------------------------------------------------------------------------------------------------------------+ |**LEVEL_SET** |Name of the model for level-set dependent thermal exponent factor. Allows for this exponent level to be a | | |function of the level-set field. Specifically used for changing the thermal exponent 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 thermal exponent in the negative regions of the level set function. | | | * - the value of thermal exponent 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 thermal exponent to 0.5. :: Thermal Exponent = CONSTANT 0.5 ------------------------- **Technical Discussion** ------------------------- See Description/Usage for *Liquid Constitutive Equation* card.