This model describes a centrifugal pump (or a group of nParallel pumps)
with ideally controlled mass flow rate or pressure.
Nominal values are used to predefine an exemplary pump characteristics and to define the operation of the pump.
The input connectors m_flow_set or p_set can optionally be enabled to provide time varying set points.
Use this model if the pump characteristics is of secondary interest. The actual characteristics can be configured later on for the appropriate rotational speed N. Then the model can be replaced with a Pump with rotational shaft or with a PrescribedPump.