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Undergrad Why do bubbles coalesce in liquids?
The bubbles I see are around 2 or 3 maybe 4 mm in dia and i presume this will cause some circulation as they rise. Difficult to estimate I presume. I still think the surface will have some deformation due to the bubbles presence and also the surface tension. Again hard to estimate or model but...- chef
- Post #10
- Forum: Classical Physics
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Undergrad Why do bubbles coalesce in liquids?
Kashishi I think we are talking about bubbles on the surface and not rising up in the fluid, that would be a very different scenario I think. Also way more complex with buoyancy, motion, viscosity etc so it is just the simpler case of the surface. I recommend a glass of gin and tonic and just...- chef
- Post #7
- Forum: Classical Physics
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Undergrad Why do bubbles coalesce in liquids?
Thanks A T I kinda thought as much but when they sit on the surface they only get attracted when the 2 bubbles are within the 8 times diameter of each other so is there some limit to how far the surface tension acts. I would have thought that the surface tension was like a field that diminishes...- chef
- Post #3
- Forum: Classical Physics
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Undergrad Why do bubbles coalesce in liquids?
I noticed whilst watching the tiny bubbles rising up in a glass of tonic that if they are close enough to each other they come together and coalesce. I tried to note the distance and my best guess was that at 8 times the bubble diameter the bubble attracts others. Sometimes they get attracted...- chef
- Thread
- Bubbles
- Replies: 9
- Forum: Classical Physics