In the fluid aspect, the links’ step and the solver’s solution work just like the other aspects.
Non-linear flow equations, such as the fluid conductance, are linearized in step using the potential from the previous network solution.
The big difference is in the links’ computeFlows and the nodes’ integrateFlows, where we do the transport & mixing of fluid types and balancing their fluid properties.
This results from the complexity of fluids and their additional properties beyond generic potential.