Articles tagged with Vortices
The development of optical vortices has been divided into three stages: fundamental theories, application development, and technology breakthrough. The recent stage has seen significant advancements in metasurface and OAM-multiplexing, enabling high-capacity optical communication and novel nonlinear phenomena.
A team of researchers at New York University's Courant Institute of Mathematical Sciences found that fish swimming in orderly groups or formations spend less energy and move faster than when swimming alone. The best arrangement, diamond-shaped lattices, yielded the greatest speeds and largest energy savings, confirming a long-held belief.
Researchers from MIPT Laboratory of Topological Quantum Phenomena discovered a way to locally control and manipulate Josephson vortices using a magnetic force microscope. This breakthrough enables the creation of future superconducting quantum computing machines.
Scientists have observed dynamic patterns of Skyrmions in a material called Cu2OSeO3, which can be controlled and manipulated using an external magnetic field. The research team used a novel technique to measure the dynamics of these skyrmions in detail for the first time.
A research team led by the University of Tsukuba created the most complete recording of a human swimming underwater like an eel or lamprey. The study found that jets produced by coalescing vortices help explain the efficiency of this swimming method, which might be applied to novel propulsion systems.
Scientists at Harvard confirmed a 23-year-old theory of superconductors by studying ultra-thin bismuth-based materials. The confirmation offered a quantitative description of the anomalous reverse Hall effect, shedding light on the behavior of magnetic vortices in high-temperature superconductors.
A University of Queensland study confirms a 70-year-old theory on fluid turbulence, which causes inefficiency in transporting fluids through pipes and affects ship movements. The research uses ultra-cold atom systems to control and measure the phenomenon.
Researchers have experimentally verified a 70-year-old theory of turbulence, shedding light on large-scale vortices in 2D fluid flow. The studies, published in Science, offer promise for future research on emergent structures in interacting quantum systems.
New Zealand and Australian researchers have observed a 70-year-old prediction about superfluids, which may have implications for understanding quark-gluon plasmas and electrons in solids. The team created a superfluid using optical manipulation technology and precisely stirred vortices into the fluid.
Researchers at Tokyo University of Agriculture and Technology found a close relationship between vortex flow and pressure differences in the ventricles of the heart, which may signal heart dysfunction. The study suggests that these indicators could be used as new markers for cardiovascular dysfunction leading to heart failure.
Scientists at EPFL demonstrate for the first time that it is possible to use light to dynamically twist an individual electron's wave function. This enables the creation of an ultrafast vortex electron beam that can be used to encode and manipulate quantum information, as well as control magnetic materials.
Scientists at Peking University control crystal growth and material assembly by utilizing fluid flows. A stable single vortex is produced, enabling oriented deposition of materials.
A team of researchers has successfully generated ultra-short spin waves in an astoundingly simple material, opening up new possibilities for the development of spintronics. The achievement uses a magnetic material shaped into circular disks to create spin waves with wavelengths as short as 80 nanometers.
Researchers developed a simple nondimensional parameter called 'aneurysm number' to classify the flow mode in both sidewall and bifurcation aneurysms. The parameter can substitute flow factors, potentially reducing the need for cumbersome measurements and simulations.
Researchers at Tokyo Institute of Technology develop a novel multiplexing technique using the optical vortex to encode independent signals, enabling high-speed data transmission with low energy consumption. The device has been fabricated and demonstrated its potential in improving optical networks.
A study reveals that raindrop impact liberates thousands of dry dispersed spores, increasing their height and exposure to wind. This phenomenon enables the transport of plant pathogens beyond leaf boundaries and across several kilometers.
Researchers have documented 'walls bound by strings' in superfluid helium-3 for the first time, potentially helping explain how the universe cooled down after the Big Bang. The findings may also provide a model for topological quantum computing.
Researchers have discovered that dynamic stall at high speeds is characterized by tiny flow structures within a vortex, making it difficult to control. By understanding these turbulent fluctuations, they aim to develop ways to interact with and control the flow field, potentially leading to improved aircraft performance.
Researchers induce transformation between meron-antimeron and skyrmion lattices using magnetic field. The ability to manipulate nanometer-scale spin textures is key to developing next-generation spintronics with low power consumption.
Researchers found that a combination of climate and weather factors, including a pyro-cumulonimbus cloud, led to the formation of a firenado in the Carr Fire. The vortex was spinning with the power of a class three tornado and contributed to the fire's rapid spread.
Researchers at OIST investigate viscoelastic fluid flow over wavy surfaces, revealing unexpected effects of elasticity. The critical layer, a region where vortices are amplified, is confirmed experimentally for the first time.
Scientists at Naval Postgraduate School discovered Coriolis effect influences even small ocean disturbances with high Rossby numbers, challenging fundamental fluid dynamics theories. The study found that planetary rotation determines the evolution of eddies in wakes as small as 10 meters.
Researchers studied knotted steel chains in a viscous fluid, reproducing Kelvin's vortex atoms. The chains formed stable, toroidal structures with intertwined loops that swirled around each other.
Researchers found that thin liquid and insoluble films on the surface of water enhance horizontal eddy currents by interacting with surface waves. This enhances vertical vortex flows near the surface, which affects surface wave amplitude. The study's results have potential applications in materials science, geophysics, and ocean analysis.
A study published in Scientific Reports refutes the long-held hypothesis that zebra stripes aid cooling, instead revealing no significant temperature difference between black and white stripes.
Scientists have observed superconducting vortices in an ordinary metal when it is brought into contact with a superconductor, demonstrating the existence of induced quantum coherence. This discovery enables a better understanding of the processes occurring at the interface between superconducting and normal phases.
Magnetic vortex structures enable high-performance magnetic sensors with improved sensitivity and integration, reducing interference signals and noise. Researchers redesigned the transducer element to align atomic magnetic dipoles in a circular pattern, leading to direct changes in electrical resistance.
A new system discovered by Jankó and collaborators enables ongoing adjustments to the material's properties over time. This allows for multiple reversible spin cycle configurations for the vortices, which can be rearranged site by site.
New research at the University of Illinois reveals that wing geometrics can be designed to reduce or eliminate wingtip vortices almost entirely. The study simulated flow about three classic wing configurations, finding that Jones and Prandtl wing designs had weaker wakes. The findings hold implications for aircraft design, flight safet...
Researchers used numerical modeling to study the dynamics of supersonic flow, revealing two induced combustion modes and a local quasi detonation mode due to incident shock waves. The simulations provide valuable insights for scramjet engine design, enabling the optimization of mixing and combustion processes.
A Rutgers University study finds that warmer Arctic temperatures cause extreme winter swings in the US, leading to colder winters in northern Europe and snowier conditions. The research suggests a strong connection between Arctic warming and severe winter weather patterns in the eastern United States.
The Southeast US has experienced colder winters despite global warming, according to a Dartmouth-led study. The polar vortex allows arctic air to plunge into the region, resulting in persistently cooler temperatures. This phenomenon, known as the U.S. warming hole, is linked to natural climate cycles and potentially to climate change.
A team of engineers and biologists have developed a bioinspired structure that can increase airfoil lift and decrease drag. The new vortex generators are based on the shape of shark scales and have shown significant improvements over traditional designs.
Physicists at Aalto University found friction in superfluid helium-3 isotopes despite being in laminar motion at zero temperature. The discovery could help understand turbulence in classical fluids and improve aerodynamics, as well as contribute to studying neutron stars.
A new study published in PNAS shows that ocean currents can concentrate marine debris, known as flotsam, into small areas. This phenomenon has implications for ocean cleanup projects and could help predict where concentrations will occur.
A new study introduces a fully 3D-printed whisker sensor that detects underwater vortexes with high sensitivity. The sensor's design, made of polyurethane, graphene, and copper tape, mimics the whiskers of a sea animal.
Scientists at Berkeley Lab study exotic material's properties, revealing chirality in polar vortices. This property could enable new forms of data storage by controlling left- or right-handedness in materials, similar to magnetic materials storing data as ones or zeros.
Researchers at OIST created a device to study small-scale whirlpools and found that adding polymers reduces vortex intensity, saving energy. The discovery has implications for optimizing flows in lab-on-a-chip devices and improving inkjet printer resolution.
Scientists at Harvard have created a new tool to study novel aspects of light, enabling more complex operations and applications. The metasurface connects two aspects of light, allowing for the creation of any structured beam, including spirals, corkscrews, and vortices.
Yale researchers Darryl Seligman and Greg Laughlin have created a new model for understanding how black holes, planets, and galaxies emerge from the vortex-rich environments of space. They found that vortices may shed Rossby waves as they spin and that the number of orbits between two vortices is different in their model.
A new study finds that weak states of the high-altitude wind circling the Arctic have become more persistent, causing extreme winter chills in parts of the Northern hemisphere. The weakening of the polar vortex is linked to cold winters in regions like Russia and Europe.
Researchers developed a new inlet design for Hall thrusters that significantly increases thrust by creating a vortex in the discharge channel. The design improvement resulted in higher gas density and uniformity, leading to improved performance and increased specific impulse of up to 53.5%.
Researchers at Lund University discovered that jackdaws minimize energy consumption when flapping their wings by creating multiple small vortices. This unique phenomenon could lead to more efficient flight in birds and potentially influence aircraft design.
A summer 'vortex' of cold air over the Karakoram mountain range is inducing an anomalous cooling that causes glaciers to grow in spite of global warming. This unique temperature control system has significant implications for ice melt rates and river flows in the region.
University of Chicago physicists create thin-core vortices and measure total helicity for the first time, showing it maintains a constant value during viscous fluid flow. The study overcomes experimental challenges by precisely positioning dye using a Sharpie marker, advancing understanding of vortex behavior.
A new control technique has been developed to achieve tight formation control of unmanned aerial vehicles (UAVs), reducing power requirements by minimizing vortices effects. The technique uses an adaptive control scheme to estimate and suppress the aerodynamic interference caused by closely flying UAVs, improving overall performance.
Researchers at IMS have shown theoretically and experimentally that high-energy electrons in circular/spiral motion radiate vortex photons across a broad wavelength range. This discovery indicates that vortex photons are ubiquitous in the universe, paving the way for a new research field.
A new microscopy technique reveals ultra-fast vortex dynamics in superconducting materials, with vortices traveling at rates of tens of GHz and velocities up to 72,000 km/hr. This breakthrough offers insights into fundamental physics of vortex dynamics, crucial for many applications.
A new simulation based on the von-Kármán-Sodium (VKS) dynamo experiment investigates the effects of fluid resistivity and turbulence on the collimation of the magnetic field. Researchers found that using magnetized ferromagnetic materials increases the magnetic field collimation, while conducting materials weaken it. This study contrib...
Research by Brown University geologists reveals that ancient Mars impacts generated tornado-like wind vortices that scoured the surface, exposing blockier surfaces beneath. The winds, which reached speeds of up to 500 miles per hour, were responsible for creating bright streaks on the Martian surface.
A team of scientists has discovered a new rotational force inside magnetic vortices that makes it easier to design ultra-high capacity disk drives. The finding was made using intense x-rays and revealed a non-adiabatic spin-transfer torque that is crucial for electrical manipulations.
Scientists investigate the motion of vortex domain walls in ferromagnetic nanowires driven by magnetic fields. The research aims to improve control and reliability for spintronic devices, enabling logic gates and data storage.
Researchers at Argonne National Laboratory created tiny swirling vortices out of magnetic particles using magnetic fields. The discovery provides insight into the behavior that governs such systems and opens up new opportunities for materials and devices with new properties.
Researchers uncover link between vortices and statistical properties of hydrodynamic fluctuations, enabling prediction of pollutant advection and mixing. The study provides valuable insights into emergence of coherent structures like cyclones and anticyclones from chaotic conditions.
A new study reveals that the head, upper arms, upper legs, and thighs are significant sources of drag for downhill skiers, with potential applications in designing better ski equipment and improving performance.
Tiny starfish larvae create vortices that bring food close enough to grab while simultaneously speeding away from scarcity. This mechanism allows the larvae to make feed-versus-speed tradeoffs, optimizing their energy expenditure.
Scientists at Aalto University discovered half-quantum vortices in superfluid helium, a topological defect that overcomes limitations of circulating currents. This breakthrough may enable access to isolated Majorana modes and exotic solitary particles, crucial for quantum information processing.
Researchers use laser tweezers to control and arrange Abrikosov vortices in a superconductor, creating an AV-pattern. This technique has potential applications in quantum computation and optically controlled rapid single flux quantum logic elements.
Researchers found that wind patterns in the lowest 500 meters of supercell thunderstorms can help predict whether a storm will generate a tornado. This discovery may lead to better predictions and fewer false alarms during tornado season.
Researchers have discovered 'spatiotemporal optical vortices,' or STOVs, which are 3-D ring structures generated by high-intensity lasers. These structures have the potential to manipulate particles moving at the speed of light and may be useful for designing powerful microscopes and more efficient telecommunication lines.