Cavitation bubbles interaction

[crx]

- Lest say that we have a homogeneous liquid that is vibrated at a certain frequency so we get cavitation bubbles inside the liquid. Let's say that the cavitations lifetime is long enough to play with them.
- Could we manipulate these cavitation bubbles so we can move them around and bring them close together? Maybe we could use some kind of electric fields system for that...
- What kind of interaction would we expect between two cavitation bubbles in close vicinity? attraction, repulsion, anihilation?
- If this bubble is moving in a imperfect fluid, than will the vibrating molecules of fluid that makes up the "bubble" move together with the buble or the buble is moving as a wave through the fluid?

 

[eljose79]

I find this topic very interesting and would like to share my knowledge and thoughts on it.

Firstly, let's define cavitation bubbles. These are small pockets of gas or vapor that form in a liquid when the pressure is lowered to its vapor pressure. In the case of vibrating a homogeneous liquid, the pressure changes rapidly, causing the formation and collapse of cavitation bubbles.

To answer the first question, yes, it is possible to manipulate these cavitation bubbles. One way to do this is by using acoustic or ultrasonic waves to control the pressure changes in the liquid, which in turn affects the formation and movement of the bubbles. Another method could be using electric fields, as suggested in the forum post. By applying an electric field, we can induce charges on the surface of the bubble and manipulate its movement.

Next, the interaction between two cavitation bubbles in close vicinity would depend on several factors such as their size, shape, and the properties of the surrounding liquid. In general, we would expect some form of attraction between the bubbles due to the pressure difference between them. However, if the bubbles are of different sizes, there could also be repulsion due to the difference in surface tension. In some cases, the bubbles may even merge or annihilate each other.

Lastly, the movement of the bubble in an imperfect fluid would depend on the fluid's viscosity and the bubble's size and shape. In a low-viscosity fluid, the bubble would move as a wave through the fluid. However, in a high-viscosity fluid, the fluid molecules would move together with the bubble, causing it to move as a whole.

In conclusion, the manipulation of cavitation bubbles is a complex and fascinating field of study. With further research and experimentation, we can gain a better understanding of their behavior and potential applications in various industries such as medicine, engineering, and materials science.