Requesting help with understanding "*_slab.csv" output data

[bjork3]

Hello CFAST users,
After running the attached "NearFld02.in" file (built from the Users_Guide_Example.in) with the "debug Output" selected, I am able to obtain the "NearFld02-copy_slab.csv" file output. However, I am confused as to some of the details.

The simulation features two compartments with one vent between and one window out. The vent (door) between the compartments opens at 60s and remains open. The simulation runs for 1200s (20 minutes).

1. Slabs seem to be computed horizontal flow through vertical vents: page 25-28 of this 1993 technical manual
   In my model and in my .csv, there are two vents. Each has space for up to 10 slab data. For each Vent, there is a numbering system of slabs that might be this:
   
   But since the csv output only numbers the slabs and provides w (mass rate, kg/s I assume), I am having trouble visualizing the information in the csv.

2. The "num slab" column does not seem to be counting the number of slabs with non-zero data for each vent. For Vent 1, at 1.63E-03s num slab = 1 but there is flow in both slab 1 and slab 2.

3. The time step in this .csv file seems set by the program (I have 1 second set for text, smokeview, and spreadsheet output interval). Here there are many smaller time steps, which I imagine are the program solving iterations of the mass and enthalpy flow for the vent?

Long story short, I would like some help please to read and use the valuable vent data in the _slab.csv CFAST output file!

NearFld02_slab.xlsx
NearFld02_slab.csv
NearFld02-in.txt should be a .in file