The rain was slowly falling, and there were several hanging droplets on the wires. Mizukawa pointed to the droplets and said, "Do you know the reason why the droplets are hanging?"

Liuzi Fenglai said without hesitation: water is a liquid and has viscosity, and it is the viscosity that makes the water droplets hang.

People may not be satisfied with the stickiness, but it is related to the shape of the water molecules. I suspect that water molecules have special shapes at the microscopic level. We've talked about the phenomenon of tangled headphones, where shape plays a big role. Actually, here too. The water molecule has a spiral shape and is a spring. The fluidity of the water molecule is due to the constant impact of many small springs, and its viscosity is due to the fact that it has barbs. Due to the fluidity of water molecules, the barbs of water molecules are hooked together. However, the system in which the two barbs are connected is very unstable. As soon as it encounters a greater action of an external force, it will separate.

Duenas said: I don't think that's the case. Water is sticky because of sticky sheets. What is a sticky sheet? It is the real reason why water is sticky. Sticky pieces are found in all directions, but are not connected to each other. On the wires, water molecules keep falling on the wires. Countless sticky pieces are stacked on top of each other to form a thin film. I call this film mucous membranes. The presence of mucosa is the reason for the hanging of water droplets, while the rupture of the mucosa is the reason for the dispersion of water droplets.

Margarita said again: Fill a bottle and cover the mouth with a piece of paper. Then, turn the bottle upside down so that the water won't come out. Why is that? The answer is surface tension. As you can see from here, the surface tension is great. The water droplets hanging under the wires have surface tension on all three sides, which can completely overcome gravity. As long as the surface of the droplet is not broken, the droplet will not fall.

Mizukawa said slowly: I don't know if you have heard of laminar flow? Actually, I just want to tell you that water doesn't just flow from top to bottom, I think there must be a kind of flow similar to laminar flow in the hanging water droplets. I'll call it closed flow. Closed flow, as the name suggests, is to carry out closed flow.

All three said, "I don't understand." Can you explain how the closed flow works?

Mizukawa Yonemichi: I don't know the specifics, but the actual situation may be much more complicated than we think. The situation you are talking about may be true. And there is a balance of forces in the water droplets. Once the equilibrium is broken, the droplets naturally disperse and fall.

I suspect that the flow of water molecules is likely to be very complex in the shape of a spiral. It is precisely because of the special properties of the spiral that the water droplets are suspended under the wires. I'm not talking about the kind of spiral of the spring, which is kind of like the fractal of the Piano curve. If it had to be a name, it would be a spiral self-alike. That is, it is also a fractal.

Margarita asked: Is the flow of water molecules so complicated? Don't you think it's just your imagination? Snowflakes are fractals, I believe. However, you say that the trajectory of the flow of water molecules is a spiral self-similarity. This claim of yours is untenable, and it is difficult to find evidence.

Liuzifeng came and said: We are here to discuss, not physicists. There are inevitably some mistakes in what we say, but we should also be brave enough to express our opinions. Don't forget, this is for physics lovers. So, you should think hard about his point of view.

Okay, everyone rest, right?

(Liuzi Feng came to see the embarrassing scene, so he said it for Mizukawa Mito.) ）