IV4 – Cole Smith

IV4 – Cole Smith

This is an image of a green food coloring dye injected in a water filled flume passing over a submerged airfoil.  The airfoil is attached to the far side of the flume from the camera.  The dye was diluted with water and injected into the flow path via a needle syringe which was removed before the image was captured.  The flow in this image was relatively slow in order to produce a low Reynolds Number in the water, producing a more laminar flow of dye and water around the airfoil which better visualizes the fluid boundary layers and velocities around it.

Second airfoil image which better demonstrates the simple physics of airfoils wherein the boundary layer begins as laminar and then transitions to turbulent over the surface of the wing as a function of Reynolds number, distance along the wing, and time after dye is released.

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5 Comments. Leave new

  • Lana Pivarnik
    Nov 16, 2022 09:16

    I like that you chose to include the top of the water level. You can see how the water bows around the airfoil at the top.

  • Kendall Shepherd
    Nov 4, 2022 12:42

    I really like that you can see the boundary layer around the airfoil very clearly!
    How did you remove the texture of the paper? I was having a hard time with that.

  • Will Dietz
    Nov 4, 2022 12:36

    I really like the transition to turbulence on the end of the airfoil.

  • Kelsie Kerr
    Nov 4, 2022 12:34

    I really like the aspect ratio that you used for the image, and I really like that you chose to put it in black in white! I think it really think it adds to the impact of the image.

  • Ryan Wells
    Nov 4, 2022 12:32

    I really enjoyed your use of monochrome for this image. You can really see the turbulent flow on the back side of the air foil, depicting the physics well.


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