The distribution of air velocity in large rooms with small side-wall mounted supply openings.

The ventilation of a large room is often achieved by supplying inlet air from a small side-wall mounted opening. The velocity distribution in a typical room with a small circular inlet opening close to the ceiling is described. The supplied air forms a wall jet below the ceiling which is easy to describe in terms of velocity distribution, entrainment, etc. The jet is deflected at the end wall opposite the supply opening and the resultant flow in the lower part of the room - the occupied zone - has a rather complicated structure. This paper discusses the results of a calculation procedure which can predict the turbulent three-dimensional flow in all parts of the room including the occupied zone. The procedure is an extension of an earlier method determining the two-dimensional flow which takes place when the supply opening is of the linear diffuser type.