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Ventilation Design Handbook on Animal Research Facilities Using Static Microisolators 
23.3 Analysis of the Results for the Baseline Room 
Due to the enormous amount of data generated in the CFD runs it is not possible to discuss in 
detail the results of each case. Initially, this section will look at the flow patterns and the 
quantitative results generated in the baseline case as this will give a basic understanding of the 
animal room airflows. Subsequent sections will then compare results for the various room 
configurations without necessarily discussing each room. 
The basecase (case 01) had two radial supply diffusers (supplying 540 cfm at 18.8 °C (66.0 °F)) 
and two ceiling mounted exhausts. Five racks of 42 cages are placed along to the side walls. See 
figure 2.02. 
Figures 2.26 to 2.28 show velocity vectors, temperature distribution, and CO 2 distribution in a 
planar section down the center line of the room. The two supplies, with downward facing 
vectors, and the two exhausts are clearly visible on the ceiling. The inflow of makeup air coming 
from the cracks around the door is also obvious. The change station generates high temperatures 
in its vicinity, which causes a strong upward flow of air. This flow causes the downward flow 
from the supplies to be deflected away from the change station towards the door. The 
concentration plot shows little variation in CO 2 concentration apart from some small regions 
behind the change station and very near the ceiling. 
Figure 2.26 Basecase ( Case 01 ): Velocity Vectors 
