Numerical studies on an accidental flashfire at a water fun park by FLACS software
2021
A severe accidental fire with ‘explosion’ resulting from spraying coloured corn
flour powder occurred at a water fun park in Taiwan. The possible fire
scenarios were studied in this paper using Flame Acceleration
Simulator(FLACS). Environmental conditions including wind action and solid
boundary conditions were deduced based on government fire investigation and
video records, and were used as the input parameters in simulation. Simulation
results indicate that upon ignition of the sprayed powder, the maximum
overpressure in the open space was only 0.03 bar gauge, with a dust flash
fire generated without having an explosion. These environmental conditions or
parameters and the simulation results together would give a fire scene that
agrees with the accident observed, indicating that appropriate environmental
parameters had been identified. Therefore, CFD simulation with carefully
selected parameters can be used to reproduce explosion scenarios and to
identify key factors in supporting accident investigations.
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