[SML] Taiwan water park explosion

[Dave Vick]

On Tuesday, June 30, 2015, Chip Wood via Stagecraft <
stagecraft at theatrical.net> wrote:

 Where is the boundary in "speed" between deflagration and explosive?  Is
> there a jump or is it a continuous ramp up depending on source?
>


In broad terms, the flame-front speed or wavefront speed at which a
deflagration becomes an explosion is roughly the speed of sound.

The supersonic shock/pressure wave is what does the damage in an explosion.
In a deflagration, the overpressure wave at subsonic speeds is harnessable
to perform work, such as driving a projectile down the barrel of a cannon.


-- 
Dave Vick
Sent from my iEuphamism
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