freshphotons: “These three images are snapshots of a spark-ignited expanding flame in different environments of the same hydrogen-air mixture. The top flame shows the ideal, reference case of a stable, smooth flame surface in a quiescent environment at atmospheric pressure. The middle flame is taken under elevated pressure simulating that within an internal combustion engine. The bottom flame is taken in a highly turbulent environment simulating another aspect of the engine interior. All images were taken at 8000 frames per second, using schlieren photography. The radius of the top flame is 11.4 millimeters.”  C.K. Law, Swetaprovo Chaudhuri, and Fujia Wu (Princeton University). Explosive beauty.
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freshphotons:

“These three images are snapshots of a spark-ignited expanding flame in different environments of the same hydrogen-air mixture. The top flame shows the ideal, reference case of a stable, smooth flame surface in a quiescent environment at atmospheric pressure. The middle flame is taken under elevated pressure simulating that within an internal combustion engine. The bottom flame is taken in a highly turbulent environment simulating another aspect of the engine interior. All images were taken at 8000 frames per second, using schlieren photography. The radius of the top flame is 11.4 millimeters.”  C.K. Law, Swetaprovo Chaudhuri, and Fujia Wu (Princeton University).

Explosive beauty.

(via scientificthought)

Source: nbcnews.com

What’s in a flame? The chemistry and physics of fire are surprisingly complicated for something so ubiquitous, but there’s a pretty easy answer for “what’s in a flame?” Ions. When a candle flame is placed between two contacts holding a about ten thousand volts, the flame is pulled to the positive and negative side like a flickering butterfly. The air, usually a good insulator, allows the ions within the flame to jump to either side, allowing an arc to form.  Check out the full video from Veritasium. Spark more interest with this winning video from The Flame Challenge, explaining what fire is in simple terms. (This GIF isn’t animating on the Tumblr dashboard for some people. Click through to see the glory)
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What’s in a flame?

The chemistry and physics of fire are surprisingly complicated for something so ubiquitous, but there’s a pretty easy answer for “what’s in a flame?”

Ions.

When a candle flame is placed between two contacts holding a about ten thousand volts, the flame is pulled to the positive and negative side like a flickering butterfly. The air, usually a good insulator, allows the ions within the flame to jump to either side, allowing an arc to form. 

Check out the full video from Veritasium. Spark more interest with this winning video from The Flame Challenge, explaining what fire is in simple terms.

(This GIF isn’t animating on the Tumblr dashboard for some people. Click through to see the glory)