Modelling and simulation of continuous dense gas leakage for emergency response application

This paper aims to provide a solution for the simulation of continuous dense gas leak dispersion especially in emergency response applications. In the proposed solution, a modified plate model is presented and a dynamic simulation method is developed. To validate the performance of the modified model, its predicted concentrations are compared with both the original plate model and 19 sample concentrations from 6 trials of the publicly available Burro and Coyote field experiments. The results show that the modified model has better results than the original plate model, and could satisfactorily simulate the measured concentrations with 89.5% of the predictions within a factor of 2.5 of the observations and 94.7% within a factor of 5. Finally, a case study of a hydrogen sulfide leak accident is performed and the cloud plumes at different times (5 min, 10 min, 20 min, 30 min, 40 min) after the leakage are successfully obtained. It is very important for the real engineering application that each simulation process is very quick and take only a few seconds. In addition, the simulation results are visualized on Google Earth for a better user experience.