This model outputs the volume flow rate flowing from
port_a to port_b.
The sensor is ideal, i.e., it does not influence the fluid.
If the parameter tau is non-zero, then the measured
density that is used to convert the mass flow rate into
volumetric flow rate is computed using a first order differential equation.
Setting tau=0 is not recommend. See
IBPSA.Fluid.Sensors.UsersGuide for an explanation.
tauInv
since this now exists in
IBPSA.Fluid.Sensors.BaseClasses.PartialDynamicFlowSensor.
This is for
#372.
tau=0 as the base class
already sets tau=1.
This change was made so that all sensors use the same default value.
Modelica.Fluid.