Smoke   1 comment

The Journal “Physics of Fluids” has, since 1985, had a special section entitled “Gallery of Fluid Motion” showcasing excellent images of fluid phenomena. Recently I saw an odd cloud formation, created from an aircraft contrail:

and decided to try taking photos of smoke. Smoke consists of very fine particles of soot that usually have a small amount of excess electric charge; in good conditions an initial homogeneous cloud of soot will ‘condense’ into thin sheets that follow air currents. Here are the results, after some image processing: first some individual frames, and then a sequence of a ‘drop of smoke’ gently descending through the air.

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One response to “Smoke

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  1. Very cool!!

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