BuildingSystems.Airflow.Multizone.DoorDiscretizedOpen

# .BuildingSystems.Airflow.Multizone.DoorDiscretizedOpen

Door model using discretization along height coordinate

## Information

This model describes the bi-directional air flow through an open door.

To compute the bi-directional flow, the door is discretize along the height coordinate. An orifice equation is used to compute the flow for each compartment.

In this model, the door is always open. Use the model Buildings.Airflow.Multizone.DoorDiscretizedOperable for a door that can either be open or closed.

## Revisions

- January 8, 2019, by Michael Wetter:
  Moved parameter `CD` from BuildingSystems.Airflow.Multizone.BaseClasses.DoorDiscretized to BuildingSystems.Airflow.Multizone.DoorDiscretizedOpen.
  This is for #971.
- December 14, 2012 by Michael Wetter:
  Renamed protected parameters for consistency with the naming conventions.
- December 6, 2011 by Michael Wetter:
  Changed the computation of the discharge coefficient to use the nominal density instead of the actual density. Computing `sqrt(2/rho)` sometimes causes warnings from the solver, as it seems to try negative values for the density during iterative solutions.
- August 12, 2011 by Michael Wetter:
  Changed model to use the new function Buildings.Airflow.Multizone.BaseClasses.powerLawFixedM.
- July 20, 2010 by Michael Wetter:
  Migrated model to Modelica 3.1 and integrated it into the Buildings library.
- February 10, 2005 by Michael Wetter:
  Released first version.

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