Salah Ammar

Visualizing Boundary Layers

Salah Ammar

A video about breaking the boundary layer between oil and water by throwing an egg

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26 Comments. Leave new

  • Mary Rahjes
    Oct 3, 2019 16:27

    Interesting experiment, although when I read the description originally I thought “throwing an egg” meant you threw a whole, unbroken egg into the mixture. The layers were clear and the color of the egg made it so the audience could clearly see the three liquids interacting together.

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  • Peter Rosenthal
    Sep 30, 2019 09:55

    I think the colors you used were great for seeing all of the different fluids. The reverse was an interesting touch.

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  • Sam Brown
    Sep 28, 2019 15:27

    This was a very enjoyable video. I like the crispness of the fluid layers.

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  • Kailey Shara
    Sep 27, 2019 23:36

    I quite enjoyed this overall, though I wish the audio didn’t cut abruptly at the end. Since you already played it back in slow-mo after the video reverses, perhaps just stretch it out slightly longer?

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  • Jared Moya
    Sep 27, 2019 12:55

    Nice video! Maybe try using a tripod next time to increase stability.

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  • Abhishek Kumar
    Sep 23, 2019 18:06

    The reversing was a good touch. Could observe the flow characteristics in greater detail that way.

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  • Brian Gomez
    Sep 23, 2019 12:40

    I like the reverse in the video, but I would like more of the egg to be in focus than the front face of the glass.

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  • Robert Giannella
    Sep 23, 2019 12:37

    I like how the denser liquid was clear so that the yellow looks like it is floating.

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  • Nicholas Scott
    Sep 23, 2019 12:36

    I really liked the video going in reverse halfway through the video. I think it gave the audience a chance to focus on the details of the flow seeing it a second time.

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  • Saud Alobaidan
    Sep 23, 2019 12:35

    i liked the music and the experiment shows how boundary layers work which you did a great job demonstrating for us

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  • Byron Pullutasig
    Sep 23, 2019 12:35

    I think the substance that was dropped could have been a different color because it was hard to understand what was being dropped.

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  • Blake Chin
    Sep 23, 2019 12:35

    How did you end up picking an egg to drop into the 2 different fluids instead of something else?

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  • Robert Drevno
    Sep 23, 2019 12:35

    It is entertaining to be able to visualize the different densities of the three fluids. I enjoy the reversing of the video as well as the music choice. Why did you choose an egg?

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  • Abduljalil Almashama
    Sep 23, 2019 12:34

    Good experiment and demonstration of boundary layers. I think there were moments that were going to be really cool as still pictures zoomed in and from different angles.

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  • Antonio Gueretta
    Sep 23, 2019 12:34

    Great job, I like your choice to play the video in reverse it gives a nice balance to the video as a whole. The lighting works well to illuminate the whole glass.

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  • Alejandra Abad
    Sep 23, 2019 12:34

    It was super great o see it in reverse. It’s interesting to see the egg fall in. I didn’t know it was heavier. The lighting is cool.

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  • Jennifer Kracha
    Sep 23, 2019 12:34

    I really like the angle that you took this video. I also like how you reversed the video halfway through.

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  • Austin Ramirez
    Sep 23, 2019 12:34

    Its really interesting the mass that accumulates at the bottom of the container. The contrast in the colors makes it look good.

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  • Alejandro BarronToriello
    Sep 23, 2019 12:33

    Good video but maybe try find an audio that is more suitable

    Reply
  • Lucas Garcia
    Sep 23, 2019 12:33

    The effects you used, slow motion and rewind, added a different technique which we havent seen yet and it also lets you see how the density of the two fluids react to one another in a different way.

    Reply
  • Sophie Adams
    Sep 23, 2019 12:33

    This phenomenon reminds me of a toy I used to play with when I was little- sort of lavalamp-y. I think it would’ve been cool to show the reaction between the two liquids in slow motion instead of backward.

    Reply
  • Matthew Knickerbocker
    Sep 23, 2019 12:33

    These are some cool phenomena you captured, I really like the Rayleigh-Taylor instability that can be observed.

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  • I really enjoyed how you included the forward and reverse capture of the video. It really enhanced the visualization of the phenomena.

    Reply
  • Dawood Ahmad
    Sep 23, 2019 12:32

    I like how at some point there were two peaks due to the water pushing on the oil.

    Reply
  • Jason Fontillas
    Sep 23, 2019 12:32

    I would recommend slowing down the video so we can see more movement in detail. But the use of reversing the video was very creative.

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  • Conan McHugh
    Sep 23, 2019 12:32

    Well done experiment, really shows how boundary layers work well. Also, you did a good job of getting the actual fluid in focus throughout the entire video.

    Reply

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