Fig. 3 shows the geometry of the pushepull type ventilation
model for an industrial environment [16]. The pushepull hood
model had a volume of 9m(x) 18 m (y) 7 m (z). There were four
supply devices (3.0 m (x) 1.5 m (z) 4) on the walls for
displacement ventilation and six outlets (0.5 m (x) 0.5 m (y) 6)
near the ceiling as a general ventilation system. There were two
pushepull type ventilation hoods on the work counter (1.5 m
(x) 0.7 m (y) 2) as the local ventilation system. The geometry of