As a sealed bottle containing dyed water and vegetable oil is moved from horizontal to vertical, a Kelvin Helmholtz Instability forms at the interface of the two fluids.
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As a sealed bottle containing dyed water and vegetable oil is moved from horizontal to vertical, a Kelvin Helmholtz Instability forms at the interface of the two fluids.
Full Report Here
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I like the final color of the water near the instability, I think that I would like a little less darkness in the blue I think. Another thing you could try is using a fuzzy select to select the gray background and then filling it with a solid color, which could help the subject pop even more.
The natural light does a great job at highlighting the brightness of the fluid. Great color and contrast with the background.