The TwoPort conductive field has free causality.
Potential variables: e1: Bondgraphic effort variable of inflow f1: Bondgraphic flow variable of inflow, normalized positive for flows into the model e2: Bondgraphic effort variable of outflow f2: Bondgraphic flow variable of outflow, normalized positive for flows into the model Parameters: G1: Primary conductance (default value = 1) G2: Secondary conductance (default value = 1) G12: Coupling conductance (default value = 0)
Equations:
f1 = G1*e1 + G12*e2
f2 = G12*e1 + G2*e2