Questions tagged [bubble]

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).

30 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
4
votes
0answers
62 views

Is it true that the bubbles do not touch each other in the boiling water while going up?

I heard once that the bubbles do not touch when the water is boiling. I want to know if that is actually happening, and I would be interested to hear why it is true or not.
3
votes
0answers
226 views

Could sonoluminescence be the result of the Casimir Effect?

My question concerns Sonoluminescence. I was amazed to learn that collapsing cavitations in liquids generate temperatures greater than 20,000 Kelvin. Is it possible that the vast amount of energy ...
2
votes
0answers
23 views

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 ...
2
votes
0answers
32 views

Does a thickness of a bubble become constant over time?

Assuming no gravity, imagine you have a bubble floating in the air, does its thickness have a tendency to become constant? State a bit differently, if we start with a bubble with variable thickness, ...
2
votes
2answers
207 views

Why does air get trapped below water pouring into a glass?

The drinking-water-tap at my workplace has a low pressure continuous stream of water. When I pour water into a glass which has at least about (depth) 5cm of water in it, surprisingly large air bubbles ...
2
votes
0answers
58 views

What is the equation of state of foam, on a macroscopic scale?

Consider a large amount of soap foam (or any other substance producing foam), of mass density $\rho$ in a gravityless environment. What is the internal pressure $p$ of that foam, viewed as a fluid on ...
2
votes
0answers
38 views

Why do bubble rings stop rising near the surface, and then spontaneously dissipate?

When I've blown bubble rings in my pool I've noticed that every single time a ring rises to the surface it stops rising about 1-2 centimeters from the surface, stopping in place. Then, it ...
2
votes
2answers
270 views

Can bubbles lower water pressure?

After watching a TV show I saw that bubbles originating from underwater can lower the impact damage when something hit it at velocity. I was wondering if another implementation of this would work. ...
1
vote
1answer
43 views

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 ...
1
vote
0answers
16 views

What kind of forces develop on a solid shape suspended in bubbly fluid? Is there a name for the study of this sort of interaction?

Let's say I have a solid shape - a sphere, a cylinder, I don't know if it matters - and I place that solid in a container of water. The forces on the shape consist of gravity and buoyancy (due to ...
1
vote
0answers
87 views

How long does it take for oil to coalesce in water?

I was studying the process of coalescence in emulsions. We considered $N$ bubbles of liquid 1 floating in liquid 2. The result we derived, is that if there are some dissipative forces (diffusion) the ...
1
vote
2answers
379 views

Phase Transitions and Bubble Nucleation

The potential for a first order phase transition is shown below The phase transition occurs from the spontaneous formation of bubbles. Inside the bubbles the field value is at the "true vacuum" and ...
1
vote
0answers
125 views

What are these arcs in bubble chamber photos?

In photos such as this one, or this one (too large to fit inside post), what are the highly frenzied arcs that are really prominent in these photos? Are they simply physical walls in/of the chamber, ...
1
vote
1answer
56 views

Bubbly Flow and two phase flow modelling

When we pour vine or some other drink why bubbles move upward and what law they follow or what is the law that describe that motion? One other question If we consider a simple two phase flow between ...
0
votes
0answers
20 views

Air bubble of any shape in a viscid liquid

I am wondering about the existence of a function\action that would move the box so that the air bubble would take a given shape. Consider a subset of spaces $\Omega\subset \mathbb{R}^3$ maybe for a ...
0
votes
0answers
16 views

Gas currents within bubble injected into liquid in open container

All at room temperature. Inject gas bubbles into the bottom of an open container of liquid. Gas bubbles rise in the denser, heavier liquid. As the gas bubble is being formed within the water, surface ...
0
votes
0answers
21 views

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 ...
0
votes
0answers
37 views

What are Skyrmion bubbles?

what exactly is the difference between a skyrmion and a skyrmion bubble? Thanks.
0
votes
1answer
18 views

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 ...
0
votes
0answers
24 views

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 ...
0
votes
0answers
53 views

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 ...
0
votes
0answers
26 views

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 ...
0
votes
0answers
51 views

A question about Laplace law

In Laplace law, the force on a soap bubble from inside is $F = P.πr^2$ and what I understand that the leaning forces acting on the inside of the sphere are resolved into two components the vertical ...
0
votes
1answer
62 views

Time taken by bubble to come to surface

Does air bubble take same time to emerge from shallow water and deep water? I think the acceleration due to buoyancy will be the cause.
0
votes
1answer
36 views

Bubbles in a Pipeline 2

This question has kind of been asked before here, but aren't the gas bubbles in the pipeline also a moving fluid and so as they get constricted shouldn't their pressure decrease too. If so how are ...
0
votes
0answers
84 views

Water vapor pressure in oxygen bubble

Suppose we have a source of O$_2$ bubble formation in water at specific nucleation sites, how can we estimate the water vapor pressure inside the O$_2$ bubbles? I know that: (1): $p_\mathrm{O_2}+p_\...
0
votes
1answer
100 views

Do underwater acoustic waves create bubbles?

I am working on a science fair project, and I currently need to develop a hypothesis. I am having a little trouble, but I have some ideas. I just need one answer so that I can go on about this. I ...
0
votes
1answer
143 views

Bubble Formation in Froth Flotation process

I've recently attended a lecture on the metallurgical process of froth flotation. To make us understand froth, my teacher gave us the example of soap bubbles. But in actual practice, the flotation ...
0
votes
1answer
92 views

Bubble pressure ascending?

In water bubbles rise up to the surface. As it rises, does the bubble's pressure decrease or stay the same? I think stays the same.
-1
votes
2answers
55 views

In a real life system of waving a bubble wand or baton around how do you determine when chaos has occurred?

In a real life system of waving a bubble wand or baton around how do you determine when chaos has occurred?