************** Yield Exponent ************** :: Yield Exponent = CONSTANT [t] ------------------- Description / Usage ------------------- This card is used to specify the model for the yield exponent parameter, *F*, for the **BINGHAM** model option of the *Liquid Constitutive Equation* card, or when the *Polymer Constitutive Equation* card is **SARAMITO_OLDROYDB**, **SARAMITO_GIESEKUS**, or **SARAMITO_PTT**. Definitions of the input parameters are as follows: CONSTANT Name of the model for the yield exponent. the value of the yield exponent, *F*, which has the dimensions of inverse shear-rate in whatever units are consistent with the problem of interest and which connotes the steepness of the transition from solid to fluid behavior for the Bingham-Carreau-Yasuda model or the Saramito yield stress model. For the **BINGHAM** model, if *F* is large, the material has an abrupt transition from solid-like to fluid-like behavior, whereas for a small *F*, the transition is more gradual. For the **SARAMITO_OLDROYDB**, **SARAMITO_GIESEKUS**, and **SARAMITO_PTT** models, the material has and abrupt transition when *F* equals zero. This Transistion becomes smooth for nonzero when *F* is greater than zero, with the transition becoming more gradual as *F* increases. -------- Examples -------- The following is a sample card that sets the yield exponent to 10.0 :: Yield Exponent = CONSTANT 10.0. -------------------- Technical Discussion -------------------- See Description/Usage for *Liquid Constitutive Equation* and *Polymer Constitutive Equation* cards.