Natural ventilation flows established by a localised heat source in a room with a doorway and a high-level vent

Ventilation flows generated by a localised heat source within room containing two openings to the ambient environment are examined. The representative of doorway and high-level vent, steady two-layer stratification well-mixed fluid is established for all cases considered. Classical displacement ventilation flow observed when interface between layers above height doorway. Displacement can persist below doorway; in general, however, an unbalanced exchange forms across ventilating found be dependent on aspect ratio, relative height, effective area vent (relative square height) rate entrainment into plume source. An analytical model presented which predicts rates temperature structures these flows. Results from analogue experiments demonstrate good agreement with wide range parameter space relevant full-scale application. • Buoyancy driven vent. Localised drives transitions regimes defined. enhanced doorways. Consistent results theory span typical Application design scenarios highlights how deployed.