Author(s): K. Matsuura, H. Kanayama, H. Tsukikawa & M. Inoue
The numerical simulation of hydrogen dispersion in a partially open space is
performed in this paper.
The transient behavior of hydrogen and the process of
accumulation in the space are discussed.
Also, the effects of changing vent
positions, vent conditions and surrounding atmospheric currents on the
distribution of hydrogen concentrations are shown.
Based on the results,
conditions for preventing the dispersion and accumulation of hydrogen in the
space, and the importance of incorporating a relationship with the outside
environment in the computation, are discussed.
dispersion, computational fluid dynamics, hazard modelling,
ventilation, atmospheric current.
Safety is recognized as one of the most important issues in promoting hydrogen
Accompanying its extensive usage, the possibility of accidental release is
considered to increase in hydrogen infrastructure including storage, bulk
transportation and distribution, production and utilization.
Various safety issues from a priori to a posterior have been discussed so far,
such as hydrogen embrittlement, permeation, convective leakage, ignition and
In particular, research on the leaking hydrogen is important to prevent
accidental ignition, and is also considered to give the safety margin for leakage.
Therefore, for the safe usage of hydrogen it is necessary to predict and
understand its characteristics of leakage and dispersion.
Size: 926 kb
Paper DOI: 10.2495/RISK080401
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