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FPEC performs explosion, fire spread, smoke generation and diffusion, leakage gas dispersion simulation by using FDS developed by NIST and CFD solvers .
The figures below are the example of a concentration map.
Our proposed concentration contour map (Figure-2) is the map created by AutoCAD, based on the calculation results obtained by numerical analysis. Each color shows a range above a certain input concentration and is very clear, so we think it is very effective in use.
Figure -1 Graduated map
Figure -2 Concentration Contour Map
Example 1 [Jet Flow from an Atmospheric Vent and Gas Dispersion]
By opening the vent valve, gas is rushed into the empty pipe and its pressure and temperature vary with flowing up to the outlet and discharged to the atmosphere. The jet velocity, temperature and the gas density in the pipe were calculated thermodynamically and the gas dispersion in the atmosphere were simulated by numerical method.Usually, a jet velocity will be over sonic velocity, the dispersion behavior will be seriously affected by the jet velocity.