Questions tagged [bubbles]
A coherent region of fluid embedded in a fluid with different properties (air in water) or a coherent region of fluid surrounded by a membrane embedded in a fluid which may or may not be different (such as air in a soap membrane).
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Necking stage in bubble detachment
The first image is the bubble dynamics in nucleate boiling, in a) you can see that the bubble is detaching by minimizing contact line with surface until zero, while in b) the bubble is enlongate and ...
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What is the explanation for the structure of foam?
When you look at any gas in liquid foam, you'll see a particular structure.
You'll find that the structure consists of some bigger bubbles along with some smaller and smaller ones.
I would like to ...
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Surface tension in a bubble
In a bubble or liquid droplet how is tangential surface tension force assumed to be balanced by perpendicular pressure force?
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Calculation of surface shape in hanging bubbles
I was wondering if someone could point me in the right direction with an experiment that I am currently working on. Consider a closed container that has been submerged in a bath of liquid. The inside ...
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Why does bubble formation only happens at the point when vapor pressure becomes equal to atmospheric pressure during boiling?
I am a high school student and I am very confused about what's actually happening at the microscopic scale in an ideal solution when it's boiling?
Boiling as I understand at microscopic level is- ...
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What would happen if a true vacuum expanded within the event horizon of a black hole? [duplicate]
If a bubble of a false vacuum decaying to a true vacuum state (in one of the fields described by the Standard Model) somehow expanded starting from a point within the event horizon of a black hole, ...
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Why doesn't a frothing drink overflow the glass?
When you pour an aerated (fizzy) drink such as lemonade or beer into a glass, the froth rises above the liquid level, but usually stops rising when it reaches the rim of the glass, even though you ...
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Why does the force on bubble on a flow differ from that of a sphere in a flow?
Background:
A tiny sphere of radius $a$ in a slow moving laminar fluid flow with viscosity $\mu$ is acted on by a force given by the well known Stokes equation:
$$F_s = 6 \pi \mu a U,$$
where $U$ is ...
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Which forces keep two soap bubbles together?
I am trying to calculate how many soap bubbles can hang together against the force of gravity, but I am not sure what forces hold them together. My guess is the surface tension, so an equation like $F=...
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Hydrogen in soap bubble
I read somewhere that if hydrogen gas is passed through soap solution bubbles containing hydrogen are formed. My question is how these bubbles are stable! Hydrogen has much less density and mass than ...
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Why do bubbles of a liquid float on the same liquid for extended periods of time?
I know there is a similar question regarding this phenomenon called Noncoalescence, but the demonstrations I found of it either carefully drop a droplet of e.g. water on a calm surface of water ...
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Related bubble questions: In water vs air, what causes bubbles to form?
One thing I would guess would happen is that air released under water would diffuse through it as individual molecules rather than collecting as bubbles. I suspect the bubble effect might come from ...
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Why bubbles are not moving up in a kettle full of water?
When I boil water in the kettle, many tiny bobbles appear after a short time, long before boiling (See video here). They don't seem to come from the bottom of the kettle, like in boiling, but from ...
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Does bubble in the buble chamber represented the actural measurement of the particle or the trajectory of the potential?
The bauble chamber was used as a measurement in the particle physics. Traditionally, the thoughts were that when the particle made an excitation in the chamber, as to physically measured, a bubble was ...
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How do you mathematically describe the quantum bubble?
The vacuum is filled with quantum bubbles. In a Feynman diagram this would correspond to a closed one particle propagator line, a circle, or a bubble. I'm curious how this is described mathematically. ...
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Dimensional analysis of soap bubble formation
I was wondering how the radius of a soap bubble depends on the way it is formed and tried to come up with a simple argument using dimensional analysis. I am not sure if that argument if correct, or ...
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Two questions about Sonoluminescence in water: Does it produce Cherenkov radiation? Could be done with a laser beam instead of sound?
Two questions about Sonoluminescence in water:
Does Sonoluminescence in water produce Cherenkov radiation when the bubble is collapsing?
Could be made the same collapsing bubbles but instead of using ...
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If vacuum decay was somehow triggered inside a black hole, would the rest of the universe notice?
If vacuum decay is triggered, it will spread (at maximum) at the speed of light. But the spacetime inside a black hole is causally disconnected from the space outside. Nothing that happens inside the ...
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Since the pressure in smaller bubble decreases why does its radius decreases and not increase, as it should, in the "communicating bubble" experiment?
If we blow two soap bubbles from two communicating pipes with funnels at the ends (see the fig) and close the tube to which they are connected, air will flow from the smaller bubble to the larger ...
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Why do the bubbles in a champagne accelerate?
The bubbles in champagne are familiar to most people. They form almost exclusively at the specific points in the champagne glass, and from these they rise faster and faster. Why do the bubbles in ...
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Theoretical reason behind surface formed when blowing bubbles
For a surface with boundary as a curve in $\mathbb{R^2}$ , the surface formed when blowing bubbles may looked like a sphere with a disc of area removed.
I know that the surface tension forces on the ...
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From where do the bubbles come from in an aerated tap? [duplicate]
It is common knowledge that when the opening of a tap has many holes, the water flows out as a stream of bubbles.
But if you open the tap slowly, the water flow is laminar without any bubbles at first....
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Explanation of formation of bubbles when gases reach the hydrostatic pressure in a lake
I am learning about the hydrostatic pressure in a lake, can someone please explain to me why when the gases reach saturation in a lake, there is a formation of bubbles?
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Excess pressure of soap bubble in different medium
I have been wondering that why excess pressure of soap bubble remains
$${4S}/{R}$$
Even if it is in water or in air?
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Can a bubble of vacuum move through space?
If there are really regions in space where a vacuum exists, I have learned there can still exist electric and magnetic fields within. That makes this region then differentiable from the regions around ...
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Non-popping bubbles
I used a compressed air can to clean my laptop's keyboard and speakers. After that procedure I noticed there're small bubbles in the holes of the speakers. I've tried to pop them with a thin brush and ...
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What caused the air bubbles on the bottle wall to move downwards?
Recently, I found an interesting phenomenon. I observe that there are some air bubbles formed on my bottle wall, as shown in the image.
Then, I tilt the water bottle gently such that the water level ...
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What is this equation of volumes and pressures of the soap bubble?
Initially the uncharged soap bubble exists with the radius $r$ and the surface tension $T$
Nextly the bubble has been held the potential $V$at the surface of it and the radius of the bubble became $R~~...
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Could gravitational waves have their origin in collision of true and false vacuum?
Could the gravitational waves the consequence of the collision between a true vacuum bubble and a false vacuum bubble, at the beginning of the universe?
(as they try to explain there:
https://www....
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What is a bubble from nothing?
Recently I was reading a collection of lectures on Swampland Conjecture and came across an interesting subtitle about a bubble from nothing.
A bubble from nothing is a non-perturbative instability ...
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How does rubbing soap on wet skin produce foam, and does it really enhance cleaning?
We tend to rub soap after applying it to the skin. I found it interesting that the mere act of sliding our hands on the wet skin surface produces millions of air bubbles in the liquid, that later ...
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How the bubble size in a champagne bottle evolve?
How the bubble size in a champagne bottle evolve ? Is it fixed or is evolving with time ?
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How do bubbles rise in water?
As a concrete example, consider boiling water. As water boils, bubbles form which rise to the surface. I know that things rise because of the Archimedes principle, however as far as I understand it, ...
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Do bubbles get created when you move something in water?
I've seen in a lot of movies and animations of bubbles forming when something moves underwater (e.g., fish swimming). Is it theoretically possible (under any temperature, pressure circumstance ...
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Is it possible to make Soap bubbles last forever?
For a conventional soap bubble which burst very easily, mostly due to water evaporates or run into things that corrupt the surface tension.
Would it be feasible to make a machine that keeps humidity ...
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Bubble Detachment Dynamics
How does a gas bubble detach from a wall (say, for example, bubbles which form when water in a vessel is heated) it was sticking to?
I have an idea...
It is that when we increase the internal pressure ...
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Bubbles on the surface of tea after using a teabag
What are those bubbles/lines on the surface of my (clean) teacup after making tea with a tea bag (seethrough paper kind, wrapped in paper)? I used a kettle. The water is clean. Also what determines ...
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Why do bubbles lose their shimmer when touched by the wand?
I was playing with bubbles and noticed that bubbles that shimmer due to thin film interference tend to lose their colour when touched by a wand. When once again released they do not regain their ...
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Soap bubble with air blown in and charge distributed [closed]
So, I was trying to do this question and here is my attempt:
I first tried work out the surface tension forces like so:
I did $ F= PA$
$ P = 4 \frac{\gamma}{r}$ by laplace law
so,
$ F = 16\gamma \pi ...
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Coalescence of soap bubbles and its impact on the resulting volume
Suppose I have two spherical soap bubbles of volumes $V_1$ and $V_2$. Suppose, they are found to coalesce under isothermal conditions to form another bubble. Is the volume of this resulting bubble the ...
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Can a soap bubble bounce off a laser?
Clip; I presume some momentum transfer's at play, but can't put a full picture together. What's going on - why does the laser 'repel' the bubble? ... or is it fake?
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What are Skyrmion bubbles?
what exactly is the difference between a skyrmion and a skyrmion bubble? Thanks.
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Distance / Energy of particle when popping bubble
Hi when I am putting the Dishwashing liquid on the sponge it sometimes makes such small bubble like 5mm in the diameter that pops afterwards and I always wonder if it is possible that the particles of ...
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How to keep a air bubble bottom of a water glass?
Suppose we have a glass of water. if we make a air bubble bottom of the glass using a straw that will quickly come to the surface because of the pressure ,density difference and the gravity . Assume ...
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What causes the milk to suddenly rise up & spill out if not stopped?
Well, when milk is heated in a container its temperature starts rising & water vapor bubbles rise up through it. This initially causes a little and slowly rise in level of milk. But after certain ...
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Removing steam bubble formation during heating up water [closed]
Suppose I would like to heat up a quantity of water (at maximum 60 degrees) using a hot aluminium plate similar to a bowl. I observed that bubbles appear on the bottom aluminium surface.
Is there ...
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How is energy stored in the surface of a bubble?
In the book of Prigogine, Modern Thermodynamics, it is given on page 147 that
Another example is the natural evolution of the shape of a bubble
enclosed in a box of fixed $V$ and $T$. In
the ...
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Bubbles in pressure waves
I found an article in which they say this, at the end they say that there is a net flux of gas into the bubble, but I don't understand why, since there is a dilatational phase (in which the bubbles ...
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Formation of bubbles in a fluid
I'm reading an article (The fluid mechanics of bubbly drinks by Roberto Zenit), I have a question about it (the part of which is added as a picture)
In the article they say that the gas cavity will ...
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Effective viscosity in bubbly liquid
Motivation: I have screwed some crepes big time this morning and it made me think...
Consider a bubbly liquid (such as a crepes batter if you whisk it too much). Is there an approximate measure of ...
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