2021-05-17

Exploring Nikola Tesla’s unfinished business: discovering potential new uses in inventions 100 years ago

By yqqlm yqqlm

Exploring Nikola Tesla’s unfinished business: discovering potential new uses in inventions 100 years ago

Now called “Tesla Valve” The patented device inspires strategies for guiding the flow of water in flowing networks and circuits.

Leif Ristroph, an associate professor at the Courant Institute of Mathematical Sciences at New York University and the senior author of the paper, explained: “This 100-year-old invention is still not fully understood, and may be used in modern times in ways that have not yet been considered. It’s amazing to play a role in technology. Although Tesla is known as a wizard of electric currents and circuits, his little-known work in controlling flow or fluid current is indeed ahead of the times.”

Exploring Nikola Tesla’s unfinished business: discovering potential new uses in inventions 100 years ago(1)

At three different speeds, reverse (from right to Left) Comparison of flows. The water flow was visualized with green and blue dyes, showing that at higher speeds, the water flow would be disrupted.

Tesla valve, a series of interconnected drop-shaped loops are designed to pass fluid flow in only one direction, and there are no moving parts. The device provides a clear path for forward flow, but the path for reverse flow is slower. But the shortcomings of the latter actually show that there is a potential, unrealized benefit in situations where flow needs to be controlled rather than released.

In order to understand the function of the valve, Ristraph and his collaborators, New York University physics graduate students Quynh Nguyen and Joanna Abouezzi (New York University undergraduates at the time of the research) conducted a series of experiment. Here, they copied the design of the Tesla valve and tested it, measuring its resistance to flow in both directions.

In general, they found that the device’s response was a bit like a switch. At low flow rates, there is no difference in the resistance of forward and reverse flow, but when a certain flow rate is exceeded, the device suddenly “opens” and begins to significantly resist the reverse flow.

“It is crucial that this opening is accompanied by the generation of reverse turbulence, which uses eddy currents and destructive currents to’clog’ the pipes.” In addition, the speed of turbulence is much lower than previously observed The resulting more standard-shaped pipe-20 times lower than the traditional turbulence velocity in a cylindrical pipe or tube. This shows its power in controlling flow, which can be used in many applications. “Researchers found that the valve works even better when the flow is unstable – when the flow is in the form of pulses or oscillations, and then the device converts it into a smooth and directional output flow. This pumping action It mimics the AC-DC converter that converts alternating current to direct current.

“We think this is what Tesla thought of the device because he is considering similar operations with current,” Ristoph observed “In fact, he is most famous for inventing AC motors and AC-DC converters. ”

Today, in view of the valve’s ability to control flow and generate turbulence at low speeds, Ristoph saw the possibility of Tesla’s invention in the early 20th century for use today.

” Sla’s device is a substitute for the traditional check valve. The moving parts of the traditional check valve tend to wear out over time, and now we know that it is very effective in mixing. It can be used to use the engine and the mechanical Vibration to pump fuel, coolant, lubricating oil or other gases and liquids. “