Spark (fire)
A spark ( from vordeutsch reconstructed * fun- K-ON, MHG vunke " spark fire " ) is a glowing particle produced during combustion processes and moves through a gaseous medium. These microparticles are then called sparks.
Sparks:
- From open-burning ( fire with flame), where the particles are entrained with the rising hot air
- The grinding of metal, where chips removed from being thrown through the air
- During welding as splashes of liquid metal
Sparks can be either only extremely hot or are even still in the combustion process.
Sparks even a fire or a fire trigger. Particularly frequent sources of fire are:
- Overlooked sparks at grinding and welding work: The metallic particles are extremely hot and cool relatively slowly - they are piling up at secluded place, they trigger smoldering fires that can escalate to full fire.
- Sparks for large fires. This is favored by thermal factors and wind. When forest fires embers can fly several kilometers until they fall to the ground again ( Fall out ). Such fire contagion was the reason why in times of wood and Reetdeckung whole settlements and cities burned down at once.
See also: beacon as Customs
- Combustion theory