Dividing-wall column simulation

1 feed -> top + side + bottom (3 products)

Governing equations

The exact equations the solver works for a dividing-wall column — the same math shown in the app's "Theory" panel, not a black box.

\dot n_{i,k} = s_{i,k}\,\dot n_{i,in}\;\;(k\in\{top,side,bottom\}),\;\; \sum_k s_{i,k}=1

splits {component: [f_top, f_side, f_bottom]} (each row sums to 1); optional duty [W] — three-product thermally-coupled column (shortcut)