Page A I - 138 
Design Handbook on Animal Research Facilities Using Static Microisolators 
Air Velocity Fluctuations 1, 4,7, and 10 Minutes after Door Was Closed 
1 21 41 61 81 101 121 141 161 181 201 221 
Number of Samples @ 40 Hz 
1 min. 4 min. 7 min. 10 min. 
Figure 4.2.01, Air velocity fluctuations 1, 4, 7, and 10 minutes after the door was closed, 
respectively 
The room air velocity field varied when the door closed for one minute. The mean air velocity 
became very consistent four minutes after the door was closed. The target air velocity at point P s 
was 7.75e-2 m/s (15.5 fpm). The statistics for the mean air velocity are shown in table 4.2.01. 
The variation in mean air velocity was less than 1 percent after the door was closed for four 
minutes. Therefore, the airflow field was steady-state when the door was closed for four minutes 
and after. 
Table 4.2.01. Variables measured after the door was closed for 1, 4, 7, and 10 minutes 
1 min 
4 min 
7 min 
10 min 
Target 
Umean (fpm) 
17.77 
15.41 
15.39 
15.99 
15.50 
SE for Umean (fpitl) 
1.280 
0.132 
0.072 
0.233 
TI (fpm) 
0.072 
0.0086 
0.0047 
0.0146 
Omedian ( fpiTt) 
17.70 
15.35 
15.39 
16.04 
Range of U,™,, (fpm) 
4.66 
0.44 
0.25 
0.90 
Temperature (C) 
22.89 
22.99 
22.88 
23.01 
22.78 
