Fairy dust sprinkler, or: more neutrally buoyant particles!
What happens when the almost neutrally buoyant particles that we use to visualize the flow field have sunken out of the surface layer?
And this is how the particles are added into the tank!
The fairy-dust sprinkler comes and sprinkles more fairy dust! :-)
Thomas adding more particles
And that produces all these cute little swirls that glow bright green. So pretty! :-)
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