BuildingSystems.Airflow.Multizone.Examples.NaturalVentilation

# .BuildingSystems.Airflow.Multizone.Examples.NaturalVentilation

Model with flow reversal due to density difference

## Information

This model illustrates buoyancy-driven natural ventilation between two volumes of air. The volume `volA` can be considered as the volume of a room, and the volume `volOut` is parameterized to be very large to emulate outside air. The outside air is 20°C and at initial time, the room air is 18°C. This induces an airflow in counter clock-wise direction. Since heat is added to the room air volume, its temperature raises above the temperature of the outside, which causes the air flow to reverse its direction.

## Contents

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## Revisions

- March 26, 2021 by Michael Wetter:
  Updated comments for IBPSA, #515.
- December 22, 2014 by Michael Wetter:
  Removed `Modelica.Fluid.System` to address issue #311.
- November 10, 2011, by Michael Wetter:
  Added documentation.

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