Volume I - Section II - Animal Room Variations 
Page 11-29 
2.3 How the Data are Presented 
This section presents the outcome of the CFD simulations. There are a number of ways of 
presenting the results produced with the CFD models. These can be either based upon 
visualization of the CFD results files or based upon automated analysis of the data contained 
within those files. The former provides a qualitative approach and can be useful to understand the 
flow patterns produced within the rooms. The latter provides quantitative measurements of mean 
values for temperature, CO 2 , and NH 3 concentrations and the relative humidity in the cages and 
the room. 
2.3.1 Visualizing the Flow-A Qualitative Approach 
Three approaches are used to display the CFD results directly. Two of these show the data in 
selected planes (planar slices) while the third provides a view in a three-dimensional 
visualization of the flow of selected air stream. 
2. 3. 1.1 Using planar slices through the model 
The results can be displayed in diagrammatic form, e.g., figure 2.23 showing the concentration of 
CO 2 (kg C 02 /kg air) as a solid color fill and figure 2.24 showing air speed (m/s) as velocity 
vectors showing both direction as well as magnitude of the airflow. Values for both can be 
obtained from the color bar (key) in each diagram. The left key is the air speed in m/s (0. 1 m/s is 
equivalent to 20 fpm) and the right key is the mass fraction of CO 2 in g (species)/kg air. 
Figure 2.23 Concentration ( CO 2 ) Distribution (g/kg) 
