Modified UNIFAC (Dortmund) Calculator

This calculator estimates activity coefficients for multicomponent liquid mixtures using the Modified UNIFAC (Dortmund) group-contribution model. Components are resolved through stored subgroup decompositions and interaction parameters, with AI-assisted subgroup assignment available when database definitions are incomplete. The calculator reports the combinatorial and residual contributions separately and provides a step-by-step breakdown of the quantities used to obtain the final activity coefficients.