How does the water ring ‘bounce’? The new discovery responds to decades of old questions

There are only two examples of the ring ring in the smoke rings emitted by the jet engines. It has been studied for decades of dogant-shaped structure and its demolition movement, which has led to their role in their proposal and in the case of jellyfish and other invertebrates-biological locomotion.

A team of researchers from New York University and NYU Shanghai has revealed a significant property of vertex rings, which has been ignored for more than a century-which illuminates that when they pass through the water and reach the air (ie, how to react to water).

When a buzzer ring travels through the sideway and water and reaches the surface and meets the air, its shape can remain while its shape is mostly maintained. After the reflection, the color loses only a small portion of its energy. However, if the ring’s ring goes up directly, it breaks instead of bouncing.

This discovery helps to understand the strength and limits of the rings in the underwater propolus, including some maritime animals, and more fully sensible crisis phenomena, such as underwater volcano eruptions and thermal plums.

The professor of mathematics and physics at the University of New York and the senior author of the study, shown in the journal, “Hermann Wan Helmoltz had earlier analyzed vertex rings in mid -1800s, scientists have tried to expose the mystery of their characteristics.” Physical review fluid.

“This development enhances our understanding of their behavior by showing some of these thumb factors.”

In order to find the behavior of vertex colors in the Water Air interface, researchers-which included New York Post Documentary Researcher, Ziwang SU and NYUU’s Institute of Mathematical Sciences, also included Christina Maurovicomo, which contains numerous experiences and data.

They prepared a whirlpool ring through a small piston submerged in a water tank. Scientists have differentiated the release and angle of the piston release to create a ring of different powers and directional paths. The movement of the colors was found by fluorescent dye and was recorded by a high -speed camera.

Overall, when reaching the water air interface, there are four different results of the rings: dispersed, recovering and maintaining their shape, separating, and crossing the interface and converting into a jet of water.

Although the rings began to recover or break in terms of their movements, when they were weak and crossed the interface when they were strong and their purpose was more vertically.