Numerical Simulation and Experimental Comparison on Atmospheric Pollution Chemical Accident Hazard Predicting(CDM)

The concentration and dose model on chemical agents diffusion or the toxic clouds diffusion model over complex terrain(CDM) is established,which can be used to assess and predict atmospheric pollution chemical accident hazard,and provides fast,intuitionistic and quaniticational decision information for emergency.Contaminated field,contaminated rate,contaminated area,and contaminated depth may be computed in a few minutes.The comparison of field experiment results with numerical simulation results shows that contaminated field,contaminated rate,and contaminated depth are consistent on the whole,and the relative error of dose at different distance is less than one time.The mean relative error is 20.6%,and the relative error of contaminated depth are ?26.3% and 10.2% respectively at 0.66 g.s/m3 and 0.24 g.s/m3 dose.The comparison of CDM simulating results with water tank experiment results shows that they are similar highly in neutral atmosphere or stable atmosphere.

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