This feed contains pages with tag "flow".
Here is the simple flow example we discussed in class.
Here is the a slightly fancier example from the glpk source. The original example was a directed flow; this has been brutally symmetrized (to make it consistent with the undirected flows in our book) by adding reverse arcs. A less inefficient symmetrization simply changes the capacity constraints. There is also a dot drawing of the network and the residual graph.