What is the "kettle effect" and how scientists finally explained it

Have you ever noticed that if you gently and slowly try to pour liquid from the kettle into any container, then instead of an accurate hit, the flow breaks down along the lower edge of the spout and everything spills under kettle.

And, as it turned out, this is not an absurd accident, but a certain pattern. This effect and its scientific explanation will be discussed in the current material.

What is the "kettle effect"

The "kettle effect" was first described back in 1956 by such a scientist as Markus Reiner - one of the pioneers of the science of rheology (the study of the deformation properties and fluidity of substances).

Various scientific groups have been studying this phenomenon for decades, and now, after numerous experiments and meticulous theoretical analysis, it was found that the ongoing interaction of various forces keeps a small volume of liquid right at the edge of the nozzle vessels.

As it turned out, the whole thing is in the drop, which is formed directly on the tip of the teapot spout, the size of which directly depends on the speed with which the liquid flows out of the container. So, if the outgoing flow rate is below a certain critical value, then the flow is redirected, and the water flows down the spout of the kettle.

At the same time, the force of inertia guarantees that the liquid will strive to maintain its original flow, but the capillary forces inhibit the movement of water directly at the spout of the kettle.

In this case, the force of gravity is absolutely not important and the "teapot effect" will be equally observed both on the Earth and, for example, on the Moon.

So, in addition to really important work on the development of new types of electronics, etc. scientists are engaged in such, to put it mildly, very controversial studies that explain the "teapot effect" and similar phenomena.

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