Comparison of FDS Model Predictions With FM/SNL Fire Test Data.
Comparison of FDS Model Predictions With FM/SNL Fire
Friday, P. A.; Mowrer, F. W.
NIST GCR 01-810; 104 p. April 2001.
Sponsor:National Institute of Standards and Technology,
Available from: National Technical Information Service
(NTIS), Technology Administration, U.S. Department of
Commerce, Springfield, VA 22161.
1-800-553-6847 or 703-605-6000;
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fire models; fire tests; field models; heat release
rate; simulation; plumes; large scale fire tests;
temperature measurements; material properties
The Fire Dynamics Simulator (FDS), a recently developed
field tire model based on large eddy simulation (LES),
is used to simulate seven full-scale fire tests. The
fire tests were conducted in a large mechanically
ventilated enclosure with dimensions of 18.3 m x 12.2 m
x 6.1 m high, with air injection rates ranging from 1 to
12 air changes per hour (ACH), and fire heat release
rates ranging from 0 to 2 MW. Test measurements and
simulation predictions are compared. Comparison methods
are presented and discussed. Simulations are run with
6,000, 48,000, and 162,000 grid cells to evaluate the
influence of grid resolution on prediction accuracy. One
test series was run on six different personal computers
to explore the effects of different hardware
configurations on simulation times. A grid dependent
plume study was performed to investigate the
relationship of grid resolution and plume temperature
predictions. Increasing the number of grid cells in the
plume region does not improve temperature predictions
significantly, but does result in more accurate
simulation of plume turbulent structures.