FDSによる地中で漏洩した水素挙動の数値シミュレーションの検討

抄録

The authors have previously shown that a numerical simulation using the Fire Dynamics Simulator (FDS) can accurately reproduce hydrogen leakage experiments using the Hallway model. In this report, investigate the feasibility of using FDS to reproduce the experiment and simulation about a study of the diffusion behavior of hydrogen leaking due to damage to buried conduits. In this report, the spread of leaked hydrogen in a soil is simulated with assuming a soil as a porous media. The results of this simulation show that the hydrogen leaked in a soil is spreading in almost concentric circles as in the comparison target, but the hydrogen concentration is lower and the speed of spreading is faster than the experimental and simulation results that are used for comparison. Further detailed investigation is needed to determine the cause of the discrepancy between the past research of experimental and simulation results and the calculation results of this study.