Posted by heligone on Jul 20, 2014 | 1 comment
This is how precise my temporal resolution can be with my modified goPro and (at last) a good lens : 240 fps ( @848×480 )
Forcing freq is 60 Hz, so Faraday Freq is 30Hz, so for the usual walking mode we have 8 frame during the period of the vertical dynamic. Hence we can observe the dynamic without any strobe effect.
Question: What is the (m, n) mode of the first droplet shown in the movie ?
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Bouncing and walking droplets shot @240fps with modified gopro and canon
lens. Forcing freq. Is 60 hz.
_ a slowly walking droplet in the so called double bouncing moded (2,2).
Period is twice the forcing period, during which there are 2 contacts with
the fluid bath
_ 2 droplets orbiting with a (2,2) in the center and a (2,1) going round.
http://youtu.be/BaZqNpp29VU