Can Liquid Metals Defy Gravity and Form Perfect Spheres While Falling?

In summary, liquid metals, such as mercury, can form droplets or spheres when falling due to their strong surface tension. This was used in the past to create lead shot and ball bearings. In free fall or weightlessness, the balling effect is primarily due to surface tension rather than gravitational pull.
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Brage Eidsvik
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Will liquid metals create droplets when falling or will they create different shapes?
 
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Welcome to PF;
They can form quite good spheres ... this is how lead shot used to be made.
Munitions companies would feed molten lead through a seive at the top of a tower, and it would literally rain little metal balls at the bottom.
http://www.ipenz.org.nz/heritage/itemdetail.cfm?itemid=2228
 
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  • #3
Simon Bridge said:
They can form quite good spheres ... this is how lead shot used to be made.

Yup ... and ball bearings :smile:
 
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I believe in free fall all liquid will ball up do to the surface tension the same way they do on iss or even in deed space without any gravitational fields around to react on it there's a name for this but i just can't remember it right now and i know that rain / water when it falls in the sky it pancakes a little bit because of the air friction when falling

throw some would say that the balling effect in free fall or weightlessness is do to the gravitational pull of all the fluids particles on ever other particles in the fluid like the sun and the planets do but for smaller thing i think it the surface tension

hope this helps:cool:
 
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hsdrop said:
throw some would say that the balling effect in free fall or weightlessness is do to the gravitational pull of all the fluids particles on ever other particles in the fluid like the sun and the planets do but for smaller thing i think it the surface tension

The contribution from the droplet's own gravitational pull on itself is vanishingly small. The effect is essentially 100% from surface tension.
 
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  • #6
Brage Eidsvik said:
Will liquid metals create droplets when falling or will they create different shapes?
They can have stronger surface tension than water, that pulls them into a sphere:

https://en.wikipedia.org/wiki/Mercury_(element)
 

1. What is free falling liquid metal?

Free falling liquid metal refers to the motion of a liquid metal that is dropped or poured from a height, without any external forces acting on it other than gravity.

2. How is free falling liquid metal different from regular liquid metal?

The main difference is that free falling liquid metal is in a state of free fall, meaning it is not in contact with any surfaces or containers that can affect its shape or behavior. Regular liquid metal is typically confined and subject to forces such as surface tension and container walls.

3. What are the properties of free falling liquid metal?

Free falling liquid metal exhibits unique properties due to its free fall state. It can form spherical droplets due to surface tension, and its behavior is affected by factors such as air resistance and the height from which it is falling.

4. What are the applications of studying free falling liquid metal?

Studying free falling liquid metal can provide insights into the behavior of liquid metals in microgravity environments, which can be useful in fields such as space exploration and materials science. It can also help in the development of new techniques for handling and shaping liquid metals.

5. How is free falling liquid metal studied in the laboratory?

In the laboratory, free falling liquid metal can be studied using high-speed cameras and other imaging techniques to capture its behavior. It can also be studied in simulated microgravity environments using drop towers or parabolic flights.

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