Questions tagged [nucleation]
The nucleation tag has no usage guidance.
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Why do dry lentils cluster around air bubbles?
When I pour dry lentils into a water bowl, I notice many of them form little clusters, with an air bubble in the center.
Why does this happen? I'm guessing something about static electricity. But not ...
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Why does it take energy to grow the surface of a drop?
Classical nucleation theory predicts that the growth of small nuclei is thermodynamically disfavoured, on account of the energy required to grow its surface. I am struggling to understand why it takes ...
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What would happen to atmospheric vapour if the amount of condensation cores decreased?
Some rain is said to form from atmospheric vapour around dust particles from sand storms, smoke etc. What would happen with the vapour if condensation cores decreased in amount?
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Desorption vs reflection (or sticking coefficients) in thermal physical vapor deposition (PVD) of gold
I'm having some issues squaring competing concepts behind the kinetics of adatom deposition in thermal PVD. Mattox (Handbook of Physical Vapor Deposition) repeatedly states Au atoms vaporized via ...
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Could some kind of vacuum decay modify the most fundamental laws of physics?
A false vacuum is a hypothetical vacuum that is not actively decaying, but somewhat yet not entirely stable ("metastable"). It may last for a very long time in that state, and might ...
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Meaning of *supersaturation* in diffusion cloud chamber
While trying to build a diffusion cloud chamber using the "classical" Langsdorf method, which employs a cold plate to create a steep negative temperature gradient, inducing supersaturation in alcohol ...
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Why tap water doesn' instantly form crystals when you shake it after cooling it?
For the science fair I am doing the experiment about nucleation in which I put a bottle of water in the freezer and after one hour and a half I take it out and it is supposed to instantly freeze when ...
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Where do the air bubbles inside the pool come from?
Here's a pic of my legs in the pool water. There are tiny air bubbles on them. I thought this is the result of air coming out of my leg, but I learnt that this is not the case. Also, there seem to be ...
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Heterogeneous nucleation theory books or articles
I'm looking for books or fundamental articles about the heterogeneous nucleation theory. I'd like to understand the main effects driving it, with concrete examples.
If you have any idea plz tell me.
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Why Gibbs energy for nucleation theory?
In nucleation theory, the free energy is given by (https://en.wikipedia.org/wiki/Classical_nucleation_theory but in many other places also): $$\Delta G=\frac{4\pi }{3}r^3\Delta g +4\pi r^2\sigma,$$ ...
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Variation/Differential in Critical Radius of Homogeneous Nucleation
Getting the critical radius during nucleation from G(r) is straightforward - but in our lecture notes, a notation is used that I cannot quite wrap my head around:
The molar Gibbs Free Energy $G(r)$ ...
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Bubble formation in long plastic tube with glass windows sealing the ends
Suppose you have a plastic tube that's length is much longer than its inner diameter sealed with glass on both ends. Inside the tube is high purity water with no bubbles i.e. all gases that remain in ...
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Explanation of the effect of nucleation sites on various processes
It is common knowledge that water can be cooled and superheated in the absence of nucleation sites. Similarly, the well-known explosion of carbonated drinks due to the dropping of mentos is also ...
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Nucleation - Internal energy of a droplet
From K. Huang's Statistical Mechanics, par. 2.2:
Suppose a droplet of liquid is placed in an external medium that
exerts a pressure $P$ on the droplet. Then the work done by the
droplet on ...
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Understanding the ice-water phase transition in order to apply it on solid-solid phase transitions
Background
I'm trying to understand a solid-solid phase transition. In this transition, a crystalline material changes from one phase to the other. An example would be the alpha iron / gamma iron ...
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