Continuation of the accidentally discovered “Quantum capillary hydrodynamic effect”.

As expected, capillary phenomena play a key role in the effect.

To check, I immersed the glass with slightly soapy water in the sink after washing the dishes. The picture changed dramatically: The surfactants in the solution practically negated the mentioned effect and TRICKLES of slightly cloudy water flowed along the lower surface of the glass (closest to the bottom of the sink). When I thoroughly washed the glass, the effect immediately appeared “in all its glory.” (See the pictures taken in the morning with an interval of several seconds).

Again, the question arises about the longitudinal and transverse viscosity of water. In a jet, the longitudinal viscosity, which causes chains of molecules or their conglomerates (pentagon-dodecahedra) to adhere along the stream, is greater than the transverse viscosity, which binds them to the walls of the vessel through which they flow.

Here, the effect is reversed: The force of adhesion of water to glass (its lower surface) is greater than the forces of adhesion of molecules and complexes into longitudinal chains, which is why the jet self-splits into individual droplet portions, and the flow is quantized. On the upper surface, on which the jet from the faucet falls, there are uniform jets without the slightest quantization! Obviously, the velocity and magnitude of the flow also play a role in the effect, like the “Landau Criterion” about a certain limiting velocity of a jet of superfluid Helium Two, above which the superfluidity disappears.

Probably. Most of the water drains away from the edges of the glass in a continuous stream, and what we see is the remnants of water trapped in the form of droplets with the lower surface of the glass and slowly crawling along it to the center.

The photo clearly shows individual moving drops (and not too fast!), rather than trickles of running water, although the stream pouring from the faucet is quite strong, but still, the trickles on the bottom surface of the glass self-break into drops!

The water is warm! Too cold and too hot reduce the quantization effect.

If I find anything else interesting, I’ll let you know.

Summary:

From the original fun – game, an interesting hypothesis of an unexpectedly discovered effect turned out.

6 VIII 2026

P.S. The glass bends slightly in the center from the impacts of the jet and, most likely, vibrates, which contributes to the quantization of the jets on the lower surface.