How does a Tesla Valve work - The Hydraulic Valves - Experiment - Nikola Tesla
Ғылым және технология
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• Come funziona la Valvo...
0:00:00 | Intro
0:00:17 | Patent history of Nikola Tesla
0:00:34 | JAES
0:00:47 | Check Valves (Non Return)
0:00:59 | Swing Check Valve
0:01:32 | Tesla Valve
0:02:23 | Scientific experiment
0:04:27 | Conclusions of the scientific experiment
0:05:03 | Applications of the Tesla Valve
0:05:30 | Conclusions
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Tesla valve is a fixed geometry passive check valve. It lets a fluid flow only in one direction, without moving parts.
This valve gets its name from Nikola Tesla, who invented it in 1920 and in the patent it is described as a series of eleven flow-control segments.
We’ll show you how it works using this model, very similar to the original one.
Tesla valve is a check valve also called “non-return valve”. It belongs to the category of valves that let the flow move only in one direction.
As shown in our previous videos about hydraulic valves, most check valves, such as swing check valve, usually have a moving plug that gets activated directly by flow pressure. When fluid flows in the correct direction, the plug is open allowing the flow; whereas the plug gets back to the closing position, if the flow starts going the opposite way, impeding the reversal of the flow.
Tesla valve, instead, is a special valve, because it’s the only fixed geometry valve, which means with no moving parts.
As you can see here, when the fluid flows in the right direction, it passes mostly through the main channel with almost no deviation.
If the fluid tries to flow in the other direction we can see for instance the liquid splitting into two different ways; right after one of the flows deviates hitting the other one almost from the front. The two flows rejoin but have lost their energy and flow more slowly. This happens several times, getting the flow slower after every deviation.
Let’s do now a scientific experiment to test the correct operation of the Tesla valve!
In this controlled environment the temperature is stable at 20° C, that correspond to 68° F, at a pressure of 1013.25 hectopascal (hPa) and as a fluid we use some distilled water with colourant to better understand and see how the flow moves. With the stopwatch we’ll see how much time 250 millilitres (ml) take to flow through the valve by gravity alone, in a direction first and then in the other.
Let’s start with the direction that should be the fastest: as you can see, water flows mostly through the primary stream, zigzagging but smoothly. We did the experiment 3 times and averaged the time 250 ml of water took to pass through a Tesla valve and the result is 27 seconds.
Let’s now turn the valve upside down in order to make the water flow in the opposite direction. As you can see, when water splits most of the water flows through the secondary stream. After that, the flow rejoins flowing slightly up through the primary stream. Water keep flowing repeating this process at every stream.
We notice that it has already taken more than 27 seconds of the previous test and after 3 attempts the average time is 42 seconds.
With this experiment we’ve proved that this specific Tesla valve has a flow rate of more than 0.556 litres per minute (l/min) from one direction and a flow rate of less than 0.357 l/min from the other, hence reducing the flow rate by 35.8% changing side in the same test conditions.
It’s obvious that the Tesla valve doesn’t stop the flow completely like a normal check valve, but it can slow down the flow considerably. It’s a good option in conditions where you need to hinder a strong flow for a long period; as a matter of fact, with no moving parts less faults occur.
This valve can be used also in microfluidics, since it would be impossible to create miniscule plugs, hence gaining advantage in scalability, duration and ease of manufacture.
Do you know how many types of valves we use every single day? Watch the videos in our playlist and will find out all types of valves around you.
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You're really good in explaining everything! I've learnt so much from your channel! Thanks!
thanks you all Inside web sr team for the animation
@oceantreecreative1474
3 жыл бұрын
And OceanTree Creative for the voiceover 😉
Loved this so much. Thanks a ton for making this. Subscribed for more such well made videos in the future.
Interesting! This video has been very exhaustive!
Como engenheiro elétrico, Nikola Tesla inventou está válvula para usar com fluidos, mas ao lê sua patente podemos perceber que está válvula é um dispositivo elétrico é uma peça para ser usada como parte de outro dispositivo, seu funcionamento asemelha se a um diodo onde a corrente elétrica passa por um lado e não volta, fiz a tradução e leitura desta patente e postei é interessante...
I think if the flow was level or upwards, the reduction in time would be more significant.
@williamnavarre8169
2 жыл бұрын
I think so too. Consider the forces acting upon the particle of water at the point where the flows rejoin. In this experiment, gravity acts on that particle in addition to the pressure from the two flows, causing the water to flow through moreso than it otherwise would.
Where can i find the video about swing valves?
Гениально.
can this device stop huge ocean waves
Tesla valve is not a check valve but a relief valve
@jamuraisack5503
2 жыл бұрын
One direction flow is indicative of a check valve... how would this be a relief valve?
Real question. Can a Tesla valve be used to prevent/slow flooding along a river or a canal during a storm surge? I live along a canal and since Hurricane Matthew when my home was under a storm surge advisory (it fortunately didn’t damage our house), this has been on my mind. If the canal had tear-shaped paths excavated alongside the main waterway, would it help prevent flooding?
@dingus_doofus
2 жыл бұрын
Ultimately what floods the region during a storm isn't the river, it's the excess water from the rain following the topography. It only appears that it is the river because the water naturally pools in the lowest point in the region, which will be the riverbed if any rivers are nearby. But you might just as well get flooded on top of a mountain with the nearest rivers several hundred meters away down in the valley, like it happened to my hometown once when I was a child. Unless the valve is built in a way that provides excessive reservoir capabilites far exceeding the volume of the pre-existing waterway, the excess water would just sweep over it and surrounding landscape like it already does. Building this on such a large scale in such an environment would take up an extreme amount of space and impact river flow throughout the entire year, which will likely cause extreme problems with sediment buildup along the entire length and downstream (causing expensive and complicated maintenance, and perhaps other unforeseen issues) and could severely damage the aquatic environment. Those vortices would also pose an extreme health hazard to any individual dropping into the water (i.e. they would kill them) or any ship passing through (if that wouldn't be straight up impossible). I think you're better off with dams, reservoirs and early warning systems. If you feel that you are at elevated risk of property damage, I would look into technology designed to minimise flooding of personal properties (overflow valves for water pipes, pumps, waterproof windows and doors and there's probably more I don't know about), specialised insurance and moving particularly valuable goods upstairs.
@510Redneck
2 жыл бұрын
The more restriction the quicker it would just erode something or raise up and out to where it's less restricted.
Is there a one-way tesla valve that completely blocks the flow in one direction?
@kasvandenbergen8730
Жыл бұрын
No
Didn't Tesla design this for use with Gases?
nice, a check valve that doesn’t work…
@dingus_doofus
2 жыл бұрын
It works perfectly for any scenario where you might wish to limit flow intensity without cancelling it. With the right job, it's a great tool.
Tesla’s valve looks like bird lungs…
1:42 Who's idea was it to use diarrhea as the sample liquid ?
playing with energy is child playing game , doing things with unknow energy is different.
🤦♂️ This experiment is an abuse of a term "scientific". How is it even possible to make such a terrible mistake? 🤦♂️ There MUST be NO air bubbles inside the valve. So, fill the valve with water, lift the forward outlet side up to remove bubbles, turn it horizontally, and repeat the experiment again. Ofcourse without bubbles there will be nothing to see 🤷♂️ , but at least the flow (known volume per measured time) will be measured correctly.
In a complete hydraulic system according to Pascal's law, this valve would do absolutely nothing. In a system with air in it it would slow the flow.