Deflagration and Explosion

Industrial Accident Initial Conditions:

Various H2-air mixture compositions (4% - 75%)
Various geometry environment
Open geometry (external explosions): outside buildings, little influence of partial confinement and obstacles (in containment such as dome area)
Partially confined: limitation in space, geometrical limitations (semi-open configurations; near wall, roof; etc)
Confined explosions (internal explosions) inside rooms, compartments, pipes, etc
Various congestion
High: high space blockage by pipework, cabling, repeating obstacles, etc
Medium: intermediate level of space obstruction
Low: open space with little blockage of the flame propagation path
Ignition source