All Questions
Tagged with water fluid-dynamics
333
questions
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Can siphons improve the efficiency of hydroelectric dams?
Suppose we have built a hydroelectric dam where the water inlet is 100m above the outlet. We can now use the gravitational potential of the water to spin a turbine. However, suppose we install a ...
- 162
-1
votes
2
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103
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Why rain drops are spherical while water droplets on a glass surface are flat?
Why are raindrops spherical when falling through the air, but lose their spherical shape when they are on a flat surface?
5
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0
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121
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How do bubbles on water surface merge?
When we open a tap over a water surface, we get to see a lot of bubbles ("half merged in the water") coming out on the surface.
Now what I saw was that two such nearby half bubbles merge to ...
- 8,220
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34
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Difficulties understanding fluid flow claims in the context of animal physiology/cardiovascular networks
A topic that has repeatedly given me confusion is the notion of fluid flow through animal vasculature. I find that many of the 'physics 101' basic notions of fluid dynamics are not well-suited to deal ...
- 125
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25
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Best mesh design for a tea strainer [closed]
I'm currently designing a closed tea strainer / egg made of stainless steel and testing a prototype made of polycarbonate plastic. The problem I'm facing likely has to do with the capillary effect - ...
- 195
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35
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Capillary action strength questions [closed]
I've been studying capillary action, and I've drawn some conclusions about the behavior which surprised me, and I want to know if I'm understanding it correctly.
According to Jurin's law, the height ...
- 111
3
votes
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85
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Why do water surfaces have persistent "average wavelength" patches?
Have you ever stood above a river or lake and noticed that the surface has visible "patches"? It looks like the surface has different average wavelengths in some areas, leading to the light ...
- 131
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63
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What's the fastest speed water from a glacial dam burst could achieve? [duplicate]
I've been watching a lot of Graham Hancock videos of late, thrusting myself deep into the rabbit hole of pseudoarchaeology/alternative archaeology, and I don't really know enough to assess the ...
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26
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Does air gap between enclosed chamber and manometer influence the manometer reading?
We have an enclosed chamber filled with water. From the top of the chamber there is a metallic tube connecting the chamber to a monometer. We increase the pressure of the water inside the chamber buy ...
0
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15
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Formation of wave ripple fields (in sand)
I've read a few articles about wave ripple fields:
https://www.coastalwiki.org/wiki/Wave_ripple_formation
https://en.wikipedia.org/wiki/Wave-formed_ripple
and a few others.
However, those two ...
- 71
1
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67
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Water Vapour and Liquid Water Interactions
It is known that a certain number of particles in a sample of water have enough kinetic energy to ‘escape’ from their intermolecular bonds and into the gas phase. But what is stopping these water ...
- 11
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35
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How to find the rate at which water can pass through a semipermeable membrane that allows particles of size lesser than 0.5 mm?
I was wondering what would be the rate at which water would cross a semipermeable membrane that allows particles of size greater than 0.5 mm. Knowing that size of water molecules is 2.75 angstroms ...
0
votes
1
answer
105
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The solubility of gases in liquids. Laws and equation [closed]
I am studying the solubility of gases in liquids (flowing then into the study of oscillations of gas bubbles out of the liquid phase).
The task at the moment is to familiarize myself with the laws of ...
- 3
0
votes
2
answers
80
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Is it possible to make large waves from perfectly timed single drops of water?
Assume I have a hemispherical container of water and an eyedropper. Is it possible to add water to the container one drop at a time, such that each drop continues to add kinetic energy to the water?
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Gravity vs adhesion of a water droplet
How much volume can a water droplet that is attached to a vertical glass surface have before it begins to roll downwards?
- 195