Volume I - Section IV - Experimental Work and Verification of CFD Methodology 
Page IV • 71 
To determine turbulence intensity, air velocities were measured at a sampling rate of 40 Hz. 
Justifications of this sampling frequency are in appendix I: section 4.1. Preliminary data were 
collected at different sampling frequencies to verify the validity of using 40 Hz for this overall 
study. Air velocity data were collected for 6 seconds to obtain 240 data samples at each point. 
Table 4.1.13 Number of Collection Points and Data Numbers for Empty Room Measurements 
Zone 
Number of Collection 
Points 
Number of Variable 
Data Collected 2 
Number of Air Velocity 
Data Collected 6 
Zone 1 
5625 
33750 
6.75e+6 
Zone 2 
3240 
19440 
3.888e+6 
Zone 3 
1920 
11520 
2.304e+6 
a - number of collection points * number of variables (6) 
b - number of collection points * number of air velocity variables * 240 (40Hz 
sampling over 6 seconds) 
Sensors were mounted on a traverse system (positioned to minimize airflow interference) that 
moved the sensors throughout the room, see figures 4.46 and 4.47. The traverse was computer 
controlled to ensure the accuracy of locations of each measurement point. No people were in the 
test room during or 10 minutes prior to any measurements to ensure the room air was not 
disturbed and in a steady state. All heat generating devices (e.g., traverse power supply, 
amplifiers) were kept out of the room except for the sensing system. Measurements were not 
taken until after the door was closed for 10 minutes and room airflow reached steady-state 
conditions. The room air velocity field and temperature achieved steady-state 4 minutes after the 
door was closed. 
