This non-linear model is formulated in resistive causality. There exists a second model, HydromG, that models the same device in conductive causality. It is useful to make use of the model in its correct causality, as Modelica may be unable to automatically turn the causality of this non-linear equation around.
The hydraulic resistor model has a preferred causality away from the element.
Potential variables: e: Bondgraphic effort variable f: Bondgraphic flow variable, normalized positive for flows into the model k: Valve constant (modulated input signal)
Equations:
e = sign(f)*f2/k