This component transports fluid between its multiple inlet and single
outlet ports, without storing mass or energy. Therefore, all inlet
ports ports_a[i] are simply connected with the outlet
port port_b.
This component is required to connect models extending from
PartialModularPort_b or
PartialModularPort_ab with, for example, boundary models
prestended in AixLib.Fluid.Sources. These
models are not directly connectable because the models presented in
AixLib.Fluid.Sources need undefined port sizes and that does not hold
for models extending from PartialModularPort_b or
PartialModularPort_ab.