Missing cubic term in model used by alloySolidification app

[david-montiel-t]

The term phi^3 in governing equation 132 from Echebarria et al. (https://doi.org/10.1103/PhysRevE.70.061604). Is missing from the model. Adding this term results in unphysical simulation results with the current settings of the app.

[david-montiel-t]

The term is not missing. It appears by simply rearranging the expression below in the code:

scalarvalueType eq_xi =
((phi-constV(lamda)(U+tep+constV(U_off))(constV(1.0)-phiphi))(constV(1.0)-phi*phi));