This model describes the bidirectional air flow through an open door.
To compute the bidirectional 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.

January 8, 2019, by Michael Wetter:
Moved parameter CD
from
Buildings.Airflow.Multizone.BaseClasses.DoorDiscretized
to
Buildings.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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