Abstr:Simple room flow
Confined Flows
Underlying Flow Regime 4-11
Abstract
The pattern of air flow within a building or within individual zones or rooms underlies many practical applications of CFD. Optimising internal ventilation design is an important problem, since the ventilation air flow influences the propagation of airborne pollutants, the thermal environment, and occupant comfort conditions. The ventilation pattern in a room and its influence on thermal and pollutant transport is a complex function of many factors, such as the location of supply and extract terminals, room layout, the location and strength of heat sources, and air leakage openings.
This UFR focuses on modelling forced ventilation flow patterns generated in simple rooms or enclosures, generated by modern air terminal devices. These typically involve a high velocity and turbulence jet near the air supply terminal. This jet forces a room-size re-circulation vortex with high velocities near the ceiling and the wall facing the jet, but elsewhere within the occupied zone of the room mean velocities and turbulence levels are low.
This UFR is of special relevance to AC 4-03, Air flows in an open plan air conditioned office.
Contributors: Steve Gilham; Athena Scaperdas - Atkins