BuildSysPro.IBPSA.Airflow.Multizone.BaseClasses.TwoWayFlowElementBuoyancy

# .BuildSysPro.IBPSA.Airflow.Multizone.BaseClasses.TwoWayFlowElementBuoyancy

Flow resistance that uses the power law

## Information

This is a partial model for models that describe the bi-directional air flow through large openings.

Models that extend this model need to compute `mAB_flow` and `mBA_flow`, or alternatively `VAB_flow` and `VBA_flow`, and the face area `area`. The face area is a variable to allow this partial model to be used for doors that can be open or closed as a function of an input signal.

## Revisions

- June 27, 2018, by Michael Wetter:
  Corrected old parameter annotation.
- July 20, 2010 by Michael Wetter:
  Migrated model to Modelica 3.1 and integrated it into the Buildings library.
- February 4, 2005 by Michael Wetter:
  Released first version.

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