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Originally Posted by freebeard
Amazing Mirror Experiment Reveals Invisible Air Movement!
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From the description on Youtube.
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This is a demonstration of the Schlieren effect. This setup allows you to see changes in air density. The point light source is aimed at the concave mirror. The concave mirror reflects to a focal point. There you use a sharp edged object to partially block the light which helps create a shadow effect that allows you to see air movement.
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The comments section was rather humorous reading, and sort of middle school.
Aerohead,, thank you for the explanation of the NASA posts, but somehow I'm still wondering if there is any visual delight or subjective human brain processing of visuals involved, or if the data is all numbers on a read out.
I'm not getting that therapeutic release of brain emissions which traditional smoke and wind tunnel images give me.
And the "Amazing Mirror Experiment Reveals Invisible Air Movement! " is pretty safe in the "Wow" or "amazement factor" from being challenged by PIV as well.
http://forums.pelicanparts.com/off-t...pics-4008.html
http://forums.pelicanparts.com/off-t...ures-1738.html
