[ad_1]
1920, Serbian inventor Nikola Tesla he designed and patented what he calledvalve tube “: a tube that ensures that the interior design flows fluid in a single preferred direction, without the need for moving parts, making it ideal for microfluidic applications, among other uses. According to recent role published in Royal Society Procedure BThe Tesla valve provides a useful model for finding out how food moves through the digestive system of many species of sharks. According to new CT scans of the intestines of sharks, scientists have concluded that the intestines occur naturally Tesla valves.
“It’s time to see some really amazing shark gut spirals in some modern technology,” said author Samantha Leigh California State University, Dominguez Hills. “We have developed a new method for digitally scanning these tissues and now we can look at soft tissues in such great detail without having to split them.”
The key to Tesla’s excellent valve design is interconnected, asymmetrical, teardrop-shaped loops. In his patent applicationThis 11-segment series of Tesla flow control controls consists of “magnifications, recesses, projections, baffles or buckets. These, in a single direction where the passage of fluid has almost no surface friction, provide almost no resistance to surface friction.” an insurmountable obstacle to its flow in the opposite direction. “And because it achieves this without moving parts, the Tesla valve is much more resistant to frequent wear and tear.
Tesla claimed that the water would flow 200 times slower from its valve in one direction than the other, and that this could be excessive. A team of scientists from New York University He built a Tesla valve in 2021, according to the design of the inventor, and has tested this claim by measuring the flow of water in both directions at different pressures in two directions. Scientists have found that water flows twice as slowly in a non-priority direction.
However, the flow rate has been shown to be a critical factor. The valve offered very low resistance at slow flows, but increasing this speed above a certain threshold would also increase the resistance of the valve, creating turbulent flows in the opposite direction, thus “plugging” the pipe with vortices and disruptive currents. So, according to author Leif Ristroph, it works like a switch, and can also help smooth out pulsed flows, so that AC / DC converters convert alternating currents to direct current. In fact, Ristrophe suggested that Tesla’s intention might be to design the valve, as the biggest claim to popularity is to invent an AC motor and an AC / DC converter.
And now Tesla Valves is reporting the unusual structure of shark intestines, thanks to a team of researchers from three universities: CSU, Dominguez Hills; University of Washington; and UC Irvine.
Sharks they are predatory peaks, feed on a wide variety of species, and are therefore important for controlling biodiversity in the larger ecosystem. Most sharks have spiral intestines consisting of varying numbers of folds in the intestinal tissue, usually in one of four basic configurations: a column, a scroll, a funnel facing the back, or a funnel facing the anterior. These four types of intestines are usually represented as 2-dimensional sheets in 2D sketches divided into two dimensions after a dissection or through a three-dimensional structure. But that doesn’t give scientists much insight into how the structure works in situ.
Last year Japanese researchers reconstructed micrographs of histological sections moving from a cat shark species to a three-dimensional model, offering “an eye-catching look at the anatomy of a parchment-type spiral intestine,” according to the authors of this latest article. Co-author Adam Summers, of Friday Harbor Labs at the University of Washington, and his colleagues decided that CT scanning could achieve something similar, as the technique involves taking a series of radiographic images from different angles and then combining them into 3D images.
[ad_2]
Source link
