Simulating scintillation (twinkling)

[kylie22]

hi all,

i would like to set up a small lab experiment to try to create visible "terrestrial scintillation", whereby one can see fluctuations in air density (turbulent air), like the rear of the jet in this image:

i have sketched a small setup before i begin; the test will send a projected image through the heat to map what it does to the image as it hits the wall.
i am wondering how best to accentuate the visibility, is it about:

- having lots of heat from a source;
- mixing hot air with cold air;
- controlling the distances between wall, heat source and projector?

kylie

 

[Bystander]

https://www.google.com/search?rlz=1...1...0i7i30k1j0i67k1j0i7i10i30k1.0.so-xEiYxcoY , this give you any ideas?

 

[kylie22]

https://www.google.com/search?rlz=1C1CHFX_enUS577US577&ei=ZdRPW83cC4zvjwSr5aGgDw&q="schlieren+photography"&oq="schlieren+photography"&gs_l=psy-ab.12..0l7j0i30k1l3.8728.28586.0.33773.21.21.0.0.0.0.127.1413.20j1.21.0...0...1c.1.64.psy-ab..0.21.1411...0i7i30k1j0i67k1j0i7i10i30k1.0.so-xEiYxcoY , this give you any ideas?

Ahh this is great. Exactly what I need, thanks.