Residual Helmholtz model generic interface.
Function that provides an initializer value for the liquid-root of newton solver of volume. In the case the model will use the volume_michelsen routine this value should provide the co-volume of the model.
volume_michelsen
Solver to solve a point during numerical contination.
Function that returns true if the method should stop
Calculate Excess Gibbs and its derivatives.
Combining rule for the attractive parameter.
Subroutine to make variation in the method after a point converged
Interface subroutine for UNIFAC models temperature dependent functions