Fire Modeling Services:
- Atrium Design Smoke Control Fire Modeling
(5MW fire, 20 minute duration)
Click
here for video of failed smoke control design
(5Gb+File)
Representation of a smoke control
design by Mech.Eng. using algebraic equations
(used beyond the equations's validation), which
was also approved by the State Fire Marshal's
Office (under protest!), and NOW: CFD
modeling with sprinklers (including water
curtains and draft stops), detectors, fire,
smoke, open stairs, and occupant evacuation
indicates it will fail if ever needed for a fire
it was supposedly designed to adequately
evacuate... The 'evacuees' that turn RED will not survive due to receiving too large
of a Fractional Effective Dose
(FED) of the toxic gasses and
smoke (soot) damage to the lungs.
Quantities for occupants in atria and adjacent
residential apartments determined by OL factors
of LSC. After atria occupants evacuate, residents
will 'appear' in atria by leaving their units
after varying times. Note:
This failed design uses only two exhaust fans at
the top of the unprotected vertical opening, and
due to severe air entrainment from the unique
geometry (which is why algebraic equations were
not valid - see NFPA 92B (2005), Section A.5.4),
and an underdesigned smoke control system, there
is an unacceptable risk due to the probability
that fatalities (and thus owner's liability) will
be high should the system ever be called upon to
protect the atrium occupants and residents from a
5MW fire for 20 minutes.
Max.
FED~6.0 x10-3
w/most starting @ around 5min=>poor
design-many deaths
|
Click
here for video of smoke control design by Fire
Protection Engineer (10Gb file-sorry, but better
quality)
(5MW fire, 20 minute duration)
Same project (w/same FED settings),
but NOW as it would be
designed had a competent Fire Prot.Engineerbeen
involved using the same CFD fire model: Fire
Dynamics Simulator 5.4.3 & Smokeview 5.4.8.
Note: This design uses a
multi-level-pressurization approach involving five
exhaust fans on each of the lower two levels, three
exhaust fans at the top of the unprotected vertical
opening, and one half-size small fan at both
intermediate landings at staris, all to provide both
a tenable environment and sufficient visibility which
save lives and meets intent of the Fire Codes.
Max.
FED~1.0 w/(only 1)~2.0x10-3
@ around 5min=>good design-saves lives
This design is a Tenability Smoke Control
System using NFPA 92B (2005), Sections
4.5.3.2/4.6.4/A.4.6.4, and 2006 IFC Sections 909.8
(permits using NFPA 92B) and 104.8 (permits using
required tenability system).
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- Arson Investigation Fire Modeling
Click
here for video of sample fire investigation
simulation (2.3Gb file)
Representation
of forensic fire scene reconstruction case used
in actual investigation. The details of the
case have been withheld due to evidence and/or
privacy concerns. Anyone recognizing this closed
case
from this video is hereby requested to abstain
from revealing this knowledge to others.
This particular simulation involved a suspected
arson due to assumed (2) points of fire origin
probably not accidental.
However, modeling indicates fire started at desk
(actual single point of fire origin) - which then
spread to bread rack
(suspected second point of fire origin) so
therefore accidental cause, not arson, was the
final verdict. The unique geometry
(nearby large cased opening, etc.) and the fire
becoming ventilation controlled (notice the two
window panes that cracked and
fell out at around 79 seconds), made for unique
circumstances in this case. Luckily, no suspect
was arrested before this model was done.
Note: also modeled fire starting at bread rack
but this took out ALL the glass panes in the
window, causing the serving area
and adjacent dining room to flash over and become
totally involved - none of which the crime scene
evidence supported.
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- Forest Fire Modeling Simulation
(WFDS)
Click
here for video of forest fire simulation
(3.8Gb+File)
Representation of forest fire with
pine trees and pine needles next to grassy area
with wooden structures.
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Test Fire Hydrant !
