AixLib.Fluid.Sensors.VolumeFlowRate

# .AixLib.Fluid.Sensors.VolumeFlowRate

Ideal sensor for volume flow rate

## Information

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 AixLib.Fluid.Sensors.UsersGuide for an explanation.

## Revisions

- October 19, 2020, by Antoine Gautier:
  Changed default value for `tau` from `1` to `0`.
  This is for #1406.
- February 25, 2020, by Michael Wetter:
  Changed icon to display its operating state.
  This is for #1294.
- January 18, 2016 by Filip Jorissen:
  Using parameter `tauInv` since this now exists in AixLib.Fluid.Sensors.BaseClasses.PartialDynamicFlowSensor. This is for #372.
- August 31, 2013, by Michael Wetter:
  Removed default value `tau=0` as the base class already sets `tau=1`. This change was made so that all sensors use the same default value.
- June 3, 2011 by Michael Wetter:
  Revised implementation to add dynamics in such a way that the time constant increases as the mass flow rate tends to zero. This significantly improves the numerics.
- September 29, 2009, by Michael Wetter:
  First implementation. Implementation is based on `Modelica.Fluid`.

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