Team Second | Corey Murphey

A swimmer dolphin kicks on her side and drags bubbles across the surface

Team Second | Corey Murphey

For the Fall iteration of MCEN 5151 at CU Boulder (aka FlowVis), I wanted to capture the fluid flow around a swimmer. We can visualize the flow around a swimmer during a butterfly or “dolphin” kick performed sideways in a body of water (in this case a flume) by backlighting the flow with a light on the ceiling. The light catches the bubbles created when the upper legs drags along the surface of the pool. These bubbles act as “particles” that mark the boundary of vortices and turbulence from the kicking-induced flow.

Camera information:

Shot on a GoPro 11 Black at 4k and 120 fps using the wide angle lens. The camera was placed at the bottom of a Swim Spa or “swimming flume” (the flume was not running during this video). An overhead LED light illuminated the flow while the swimmer (me) kicked dolphin kicks on her left and right sides.

Jill Murphey for life-guarding and helping me experiment with lighting

Asher Fulero for the music “Swans in Flight” (…)

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3 Comments. Leave new

  • Abhishek Raut
    Dec 14, 2023 15:49

    Hi Corey
    I really liked the lighting and the color of the final clip. The bubbles are clear and mark the flow making it easy to follow it.
    Nice work!

  • Riley Menke
    Dec 7, 2023 21:41

    I really like how you managed to make the flow in this video look as though it stands alone on such a stark background.

  • Izzy Young
    Nov 6, 2023 12:53

    I like the lighting here, I think it highlights the flow quite nicely.


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