ZiweiZhao

ZiweiZhao

2018 Fall Get Wet

Drop water into the oil

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For the Get Wet first project, we needed to choose an interesting flow phenomenon. There are all kinds of interesting flow visualizations, such as the deformation of a liquid as it drips on a solid surface, the fluctuation of the flame during combustion, I decided to observe the process of mixing two incompatible liquids for the Get Wet project.
For the experiment set-up, I decided to use water and oil to observe. First, I inject a certain amount of water into the container, then put a layer of cooking oil on the surface of the water, and finally inject the clean water into the container. Since the experiment was located indoors, I was unable to provide perfect lighting conditions. I got a better angle by adjusting the position of the container.
Since there is no food coloring in my apartment, the mixing of water and oil is not obvious. In the picture we can see that water and oil are incompatible with each other. That is because the oil is hydrophobic. Water molecules are polar molecules with strong electromagnetic attraction between them. Yet oil molecules are non-polar and have low electromagnetic properties. It makes the oil difficult to diffuse into water, just as nonmagnetic objects are difficult to be adsorbed by magnets.
As is shown in the picture, when water is poured into the oil, a lot of bubbles are created
where the two liquids come into contact. This is because the density of the oil is less than that of water. When the water contact with the oil, the water will sink due to its own weight, and part of the air is carried in the process of water falling in the air. The air is subjected to a larger downward force from the water and a smaller upward force from oil. This is why the bubbles in the picture appear.
I set the ISO of the camera to 3200 and the shutter speed to 1/80. Because of the choice of an improper container, the curvature on the container obscures part of the field of view, affecting the imaging when we observe the pouring of water into the oil. If there is a chance, I will choose a more appropriate container, such as a straight glass.

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28 Comments. Leave new

  • Noah Granigan
    Sep 17, 2018 13:40

    This is a good picture, I think if you focused more on the contents of the container rather than the container itself, it would have more detail.

    Reply
  • Dylan Crane
    Sep 15, 2018 15:51

    It’s a great idea and I like how the image turned out. Its clear and close up. A solid background, some alternative lighting, and a different angle might help the image a little bit more. Some contrasting colors with the liquid could make it look really cool as well.

    Reply
  • Duncan Lowery
    Sep 14, 2018 15:13

    Very pleasing image – the blue reflection contrasts nicely with the yellow oil and the brown grain of the tabletop texture (which did not distract from the clarity of the bubbles). How high was the container of water when you poured it in? Is the lighting natural? If so, what time of day was this photograph taken? Getting the camera closer to the oil and water mixture or using a lens with a longer focal length will reveal more detail in the reaction.

    Reply
  • Brandon Gushlaw
    Sep 14, 2018 12:36

    The angle of the camera is unique. The physics behind your method is clear and done well. What I notice is the bottom of the glass looks like a galaxy! The flow visualization is blurred on some spots because of the glass near the top.

    Reply
  • Casey Munsch
    Sep 14, 2018 12:35

    Interesting container shape. I like the color usage and lighting in your image. Maybe shift the angle of your image to show more of the flow.

    Reply
  • Peilin Yang
    Sep 14, 2018 12:35

    Good composition and doing well to control the distracting element.

    Reply
  • Garrett Gerchar
    Sep 14, 2018 12:34

    The bubbles really capture your attention in the warm light. Why did you take the photo at that angle?

    Reply
  • Owen Brown
    Sep 14, 2018 12:34

    The images does a great job visualizing the bubbles forming throughout the vase. We talked about the air bubbles in class it might be interesting to dye your water. Then you would be able to tell the difference.

    Reply
  • Ibrahim Alhajj
    Sep 14, 2018 12:34

    I like the idea you are trying to accomplish. I think that the picture would look a lot nicer if you only focused on the oil and water mixture.

    Reply
  • Ivan Komodore
    Sep 14, 2018 12:34

    The blues and the yellows in this image are nice to look at and I think the the lighting and focus work well. The blue glow in the corner is a nice addition.

    Reply
  • Joseph Ryan
    Sep 14, 2018 12:34

    It’s a unique take on the oil and water combo, most others are adding oil to water. The flow is very cool looking, I think some additional shots from other angles would’ve been cool. The blurriness caused by the glass is unfortunate, but doesn’t ruin the image by any means. As the prof mentioned, the warm colors in the image work very well together. The droplets on the side of the glass I also think are very cool.

    Reply
  • Bradley Busek
    Sep 14, 2018 12:34

    The actual bubbles seem to be really in focus which is nice to see. I also like how your picture is the opposite of mine (I poured oil in water) but we still see something entirely different. Does pouring water in a lot quicker change the effect drastically?

    Reply
  • Brent T Eckles
    Sep 14, 2018 12:34

    Like the reverse to the common leaving oil in water. This time the water is being poured in which creates a nice bubbling affect. Could use a different background so the water stands out better.

    Reply
  • It would be nice to be cropped closer to see the image information more easily. You did a great job of capturing the moving water in a clear focus!

    Reply
  • Anna Lynton
    Sep 14, 2018 12:33

    The physics I think could be a bit more clear, maybe more difference in color between the oil and water. I also wonder if you could image differently to focus on the flow rather than the glass. I like the lighting!

    Reply
  • Matthew Finney
    Sep 14, 2018 12:33

    I like the aesthetic features of this image. The flow is clearly visible. The lighting of this photo is nice.

    Reply
  • Christopher McFadden
    Sep 14, 2018 12:33

    I like the blue glow lighting coming in from behind that illuminates the glass. The distortion from the glass is distracting though. Maybe use a rectangular glass next time.

    Reply
  • Chad Sloan
    Sep 14, 2018 12:33

    The picture looks great! The warm background works! Maybe next time focus ore on the liquid and less on capturing the whole glass.

    Reply
  • I like this image! The colors are very nice and you can see the bubbles as the oil and water interact. The shape of the glass detracts a little bit from the understanding of the image, but isn’t too bad. Did you experiment with taking the photo from different angles, such as shooting straight into the glass to get a side-view?

    Reply
  • Ross Cooper
    Sep 14, 2018 12:33

    I really like the contrast in this photo, it really makes the image pop. The lighting is also very beautiful as it shows the flow without being distracting in any way. I think the glass container is a bit distracting in the photo, but it also adds a unique touch.

    Reply
  • Eli Kopp-DeVol
    Sep 14, 2018 12:33

    I like the colors that came out in this photo. I do think however that you have captured too many things in this image, the stream of water and the top of the glass do not add much to the photo. Maybe try a different angle or get closer to the subject which you are focusing on.

    Reply
  • greg collins
    Sep 14, 2018 12:32

    The image is interesting the photo is clear. The vessel could be more clear the distortion may be taking away from the image.

    Reply
  • Michael Karns
    Sep 14, 2018 12:32

    The background adds a nice touch and contrast in the image. In the future it might be worth trying different angles that better captures the bubbles rising.

    Reply
  • Wenjin Li
    Sep 14, 2018 12:32

    The lighting is great and supports the image. It seems like a dynamic image with water drops into oil.

    Reply
  • Charles Keely
    Sep 14, 2018 12:32

    The flow is detailed and the lighting gives the image a nice glow! The refraction of the glass could have made the image less clear than it could have been however.

    Reply
  • Chris Davidoff
    Sep 14, 2018 12:32

    Some cool lihgting, pretty details in the oil. I think it would have been cool to get a more direct perpendicular shot to the vase to see the water interracting in the oil.

    Reply
  • Maxwell Rodgers
    Sep 14, 2018 12:32

    I very much like the idea of dropping water into oil instead of the other way around. The background I feel is a good contrast to the image. The light in the back right corner seems to be a bit distracting, maybe just try cropping!

    Reply
  • Jeremy Aparicio
    Sep 14, 2018 12:32

    The bubbles and white light towards the bottom compliment the image well. Lighting in the top left is well done. Perhaps if the camera was at a lower angle so that the back edge of the water is left unrefracted.

    Reply

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