Computational Flow Analysis of Chemical Terror Gas and Its Alternative Gases

Abstract

As industries develop and standards of living increase, people are being exposed to harmful gases in various places. In particular, exposure to multiple facilities is more dangerous as it results in many casualties. Training officers to reduce the damage caused by exposure to harmful gases is very important. Although it is recommended to conduct training in an environment that closely resembles the actual one, it is not possible to train using harmful gases. Training is performed using an alternative gas whose characteristics resemble those of harmful gases. It is not known whether alternative gases have properties similar to those of real harmful gases. In this study, the effectiveness of alternative gases was confirmed by analyzing the flow and diffusion patterns of harmful and alternative gases according to the training scenarios. The actual gas was ammonia while the alternative gases were helium and carbon dioxide. Carbon dioxide is heavier than air and exhibits quite different overall behavior. Helium and ammonia differ considerably in density and viscosity, but are quite similar in flow behavior. Helium was found suitable as an alternative gas for training.