This paper discusses the results of research conducted with the Ansys Fluent
programme on the air flow through natural ventilation supply and exhaust ducts
of rooms located on the ground and upper floor of a building. A scenario with air
inflow to a room through an air intake located on the basement floor level was
selected for the tests. All simulations were performed for outdoor temperatures
of +3,+12, and -15°C (simulations run for an outdoor air temperature of +12°C
are discussed in detail). The temperature inside the room is +20°C, i.e. at the
minimum temperature level for thermal comfort. The simulations address such
issues as the pressure system inside the room and in the exhaust duct, the
distribution of air temperature in the room and the vector direction of airflow
through the supply and exhaust ducts.