Volume I - Section III - Evaluation of Results and Recommendations 
Page III - 1 
3. EVALUATION OF RESULTS AND RECOMMENDATIONS 
This section presents and discusses the results generated in the CFD simulations for 101 different 
room configurations. The detailed flow patterns for each room are not discussed; the 
comparisons focus on the quantitative analysis of the CFD data. 
The analysis concentrates on eight parameters defined in section 2.4.2: 
• Mean cage temperatures 
• Mean cage CO 2 concentrations 
• Mean cage relative humidity (RH) 
• Mean cage NH 3 concentration on day 4 
• Mean room breathing zone temperature 
• Mean room breathing zone CO2 concentration 
• Mean room breathing zone (RH) 
• Mean room breathing zone NH 3 concentration on day 4 
As each day had a different NH3 generation rate, the NH3 concentrations are different on each 
day. However as the underlying mass fraction information and RH information does not change 
on a daily basis in the simulations, room performance can be compared by using the results for 
any of the 10 days. For ease of comparison, results are presented for day 4, which corresponds to 
the day most widely used to change the bedding in the mice cages. 
In addition to the day 4 NH 3 concentrations (i.e., the conditions that would arise four days after 
clean bedding is placed in every cage), a summary of the complete 10 -day cycle is presented. 
The analysis focuses on trends in the data that identify any ventilation schemes as particularly 
good or bad, and recommendations are made. The major recommendation is tested by further 
post-processing of the CFD data. 
3.1 Results for 101 Room Simulations 
Figures 3.01 to 3.08 show bar charts of the eight parameters identified as important in 
categorizing the behavior of the ventilation system on the room and the cages. The individual 
cases can be identified by comparison of the case number on the bottom of the charts with the 
complete list of cases in table 3.01 below. 
