Articles tagged with Turbulence
Scientists have made groundbreaking discoveries about how space weather affects our planet, including the role of magnetic reconnection in accelerating solar wind particles. Researchers have also found significant differences in plasma density between the solar wind and magnetosphere, shedding light on this complex phenomenon.
Scientists at MIT and General Atomics successfully controlled the density of a fusion plasma using radio waves. The experiments revealed that turbulent density fluctuations intensify when most heat goes to electrons, which can be used to minimize turbulence and optimize core temperature under fusion conditions.
Birds use collapsible wing tucks to respond to turbulent air masses, reducing lift and minimizing jolting. Researchers found that this technique could potentially be used in micro air vehicles to maintain stability in windy conditions.
Researchers from Brown University have introduced a new element of uncertainty into Burgers' equation to describe turbulence and shocks in fluid flows. This formulation aims to make mathematical models more realistic by accounting for external influences such as terrain, which was previously ignored in standard equations.
A study published in Nature found that the chemical uniformity of stars in the same cluster is due to turbulent mixing in star-forming clouds. This mixing occurs before much of the gas has turned into stars, resulting in nearly identical chemical signatures among sibling stars.
Researchers investigate quantum fluids and their chaotic motion at near-zero temperatures. The study aims to unlock the mysteries of this phenomenon, which has significant implications for daily life and galactic magnetic fields.
Researchers at UTSA aim to reduce wind turbine lifespan by studying turbulence effects; they will use advanced computational modeling to simulate aerodynamics of rotating turbines. The study's findings may lower wind energy costs and improve wind farm efficiency.
Researchers tracked 800-foot-high waves in the Samoan Passage, a key bottleneck for ocean circulation. The waves produce mixing 1,000-10,000 times that of surrounding slow-moving water.
Scientists have developed a new way to predict turbulent flow near walls, which could reduce drag by 30% and save the global economy billions in fuel costs. This breakthrough has the potential to optimize vehicle performance and reduce emissions.
Researchers at Caltech have developed a new way to analyze turbulent flow near walls, which can help reduce drag and fuel consumption in aircraft and ships. By breaking down complex equations into smaller blocks, they found that commonly observed features of wall turbulence can be explained by superposing just three response modes.
Research shows that phytoplankton form concentrated patches in turbulent ocean water, counterintuitive to expectations of uniform distribution. This phenomenon, known as 'turbulent un-mixing,' helps phytoplankton find cells of the same species without sensory information.
Researchers led by Paulo E. Arratia at the University of Pennsylvania discovered that turbulence can arise in non-Newtonian fluids, such as blood and fracking liquids, without requiring significant inertia. This finding has significant implications for understanding fluid dynamics on small scales.
Researchers at UC Davis found that turbulence in waves signals purple sea urchin larvae to start searching for suitable habitat. The two-step process involves an initial response to turbulence, followed by a chemical signal triggering settlement and transformation into juvenile sea urchins.
Theodore Kim's invention of wavelet turbulence enabled faster and more easily art-directable simulation of large-scale fluid smoke effects, used in dozens of major motion pictures. The algorithm was first presented publicly in 2008 and quickly caught fire in the industry.
A UI-led team has made the first direct measurement of space turbulence, confirming the existence of 'gusty winds' in space. The discovery sheds light on the role of turbulence in heating the sun's atmosphere and regulating star formation.
A computer model reveals that marine bacteria benefit from swimming in turbulent seawater, accessing nutrient-rich zones before they are dispersed. The study finds an optimal swimming speed of about 60 micrometers per second, which confers a feeding advantage but also incurs energy costs.
Researchers from the Niels Bohr Institute have developed a statistical model that can replicate chaotic flows in two dimensions, providing a better understanding of turbulent behavior. This breakthrough enables more accurate weather forecasting by accounting for motion patterns in the atmosphere, which are largely two-dimensional.
The new system uses wind measuring instruments and computational formulas to alert pilots to areas of moderate and severe turbulence. It enables pilots to plan better routes, reducing bumpy rides and flight delays.
Research by University of Warwick physicist Dr Kareem Osman reveals that magnetic turbulence is the key to the solar wind's surprising heat. The study shows how turbulence in current sheets heats and accelerates plasma, accounting for 50% of the solar wind's internal energy.
Researchers at the University of Cincinnati's Gas Dynamics and Propulsion Laboratory have made progress in reducing supersonic jet noise using chevrons and fluidic injection. The goal is to reduce noise by up to 10 decibels while maintaining or improving engine performance.
Theoretical physicist Dima Shepelyansky found that energy flows from large to small scales can be prevented under specific conditions, similar to the way electron currents are stopped in disordered solids. This discovery links chaos theory and turbulence, highlighting a phenomenon where energy threshold plays a crucial role.
New research highlights the impact of atmospheric gravity waves caused by thunderstorms on air safety, leading to a call for rewritten guidelines. The study reveals that thunderstorms can produce unexpected turbulence more than 100km away from storm cells, posing risks to passengers.
A Pitt engineering research team is developing quantum-computing algorithms to model turbulent combustion, a challenge in aerospace. The US Air Force has awarded a five-year grant for this project.
Researchers from SRI International and the University of Michigan have taken the first-ever measurement of naturally occurring auroral turbulence recorded using a nanosatellite radar receiver. The RAX CubeSat measured turbulence over Fairbanks, Alaska in response to a geomagnetic storm triggered by the largest solar flare in five years.
Scientists will launch five sounding rockets to study the high-altitude jet stream winds and their connection to electrical current patterns. The experiment aims to gain a better understanding of these fast winds and help model electromagnetic regions of space that can damage satellites and disrupt communications systems.
A team of researchers performed new 3-D calculations to better understand the complex conditions driving Type Ia supernovae. The simulations provide insight into the deflagration-to-detonation transition process, which is crucial for calculating cosmic distances and understanding the evolution of the universe.
Researchers used a new microwave instrument to study the interplay between plasma turbulence and surface flows in tokamak plasas. They found that turbulent eddies are shredded by large surface flows, turning off turbulence. This equilibrium is crucial for achieving high thermal insulation in fusion experiments.
Researchers at MIT's Alcator C-Mod experiment have found a novel connection between spontaneous plasma rotation and global energy confinement. At low density, the two phenomena are positively correlated, but at higher densities, they become inversely related, with rotation reversal leading to saturated energy confinement.
Research from the University of Illinois and Rutgers University suggests that returning service members are at risk of depressive symptoms and relationship distress, often linked by uncertainty about relationships and interference from partners. Recognizing these issues can help prepare individuals for the transition home.
A team of researchers at the University of Warwick has found a solution to a 40-year-old problem in understanding solar wind turbulence. By analyzing data from the Cluster mission and creating a virtual model, they discovered that turbulence is not affected by the direction of travel of the solar wind, resolving a long-standing issue.
Scientists have discovered 'surfer' waves in the sun's corona, which could help explain why it's thousands of times hotter than expected. The waves were captured by NASA's Solar Dynamics Observatory and are thought to be caused by Kelvin-Helmholtz instabilities.
Acoustics researchers at the University of Adelaide are developing a computer model to predict wind farm noise output, aiming to reduce 'wind turbine syndrome'. The team hopes to control noise through blade shape changes and active devices, improving wind energy efficiency.
A new VIMS study finds that propeller-induced turbulence kills large numbers of copepods, tiny crustaceans crucial to marine food webs. The researchers warn that this could have significant impacts on local ecosystems and water quality.
The study provides geological evidence to support the idea that the first solid material in the Solar System was fragile and extremely porous. Researchers analyzed an asteroid fragment and found that it had been subjected to shocks in space, possibly during periods of turbulence, which compacted the rock into a harder state.
A new study suggests that abnormal heart rate turbulence may be a significant risk factor for heart disease death, even among those considered low-risk. Abnormal heart rate turbulence was found to be an even stronger predictor of heart disease death than elevated C-reactive protein levels in this population.
Researchers found that an abnormal response to early heartbeats can predict cardiac death in healthy-looking individuals. Those with no conventional markers of cardiovascular disease were eight times more likely to die from cardiac causes if they had abnormal heart rate turbulence.
Researchers developed a new formula to determine optimal turbine spacing for large wind farms, suggesting turbines should be spaced 15 rotor diameters apart for more cost-efficient power generation. This improvement could address underperforming projects in the US, Europe, and China.
Researchers found that wind turbines increase airflow over nearby crops, keeping them cooler during hot days and warmer at night. This could lead to improved crop yields, reduced moisture levels and increased carbon dioxide absorption.
Researchers are developing an early warning system for bridge failures caused by scouring, using tiny fish-inspired sensors and radar technology. The system can provide real-time information on river bottom conditions and detect minute changes in depth and density of sediment.
Recent advances in computing have improved fluid modeling for low Reynolds numbers, but significant challenges remain for high-Reynolds-number flows, crucial in aeronautics and climate modeling.
Researchers at Woods Hole Oceanographic Institution developed two advanced broadband acoustic systems to improve interpretation of echoes. These systems measure sound scattering across a continuous range of frequencies, generating broadband acoustic spectra that can distinguish between different fish sizes and densities, as well as ide...
Researchers use Ulysses spacecraft and solar minimum to create a 200-million-mile-long virtual lab bench for turbulent flows. They find that the evolution of turbulence is governed by the same generalised scaling function, suggesting a universal basic property governing magnetohydrodynamic turbulence.
Scientists have discovered that extremely strong turbulent convection can lead to two distinct states of heat transport, defying the previously established law. The researchers found an exponential increase in heat transport that decreases by a power of two as the turbulence strengthens.
Dr. Beverley J. McKeon's work on simplified models of turbulence under different pressure gradients has garnered the Presidential Early Career Award. Her research aims to improve understanding of turbulence in various technologies, including commercial aviation and industrial flows.
Researchers at the University of Warwick have discovered a new type of turbulence in the solar wind that enables plasma particles to exchange energy without collisions. This finding has significant implications for fusion power development and could provide insights into energy dissipation in solar system-sized plasmas.
Researchers at MIT create a quantum memory that heralds successful storage of light beams in ultra-cold atom gases, enabling scalable quantum networking. In Brazil, scientists control the formation of quantum turbulence in an ultra-cold atom gas using magnetic fields.
Researchers found that turbulence created by material ejected from supermassive black holes' disks prevents cooling gas from forming stars. The discovery explains a long-standing mystery in galaxy cluster physics.
The NCAR system combines satellite data, computer weather models, and AI techniques to identify rapidly evolving storms and potential areas of turbulence. Pilots on selected transoceanic routes will receive real-time turbulence updates, providing critical situational awareness.
New research shows bees extend hind legs for stability in windy conditions, increasing drag and aerodynamic power by 30%. This behavior is likely seen across Hymenoptera, affecting many flying insects.
Four NASA rockets launched from Alaska's Poker Flat Research Range, releasing glowing vapor trails to study turbulence above 50-80 miles high. The experiment, called Turbopause, aims to measure the region where winds reach their largest values.
Scientists are launching five NASA sounding rockets to study turbulence in the upper atmosphere. The rockets will release a glowing vapor trail nearly 87 miles up into the sky, allowing scientists to track its movement and analyze upper-atmospheric winds.
Researchers identify ideal locations for low-impact wind farms with high frictional dissipation, reducing turbulence and its effects on local hydrometeorological conditions. By optimizing turbine spacing and rotor designs, wind farm efficiency can be increased and negative impacts minimized.
Researchers from Max Planck Institute and Technical University discover that turbulent flows in pipes will inevitably become laminar, with the transition taking many years. This finding could help save energy in applications like oil pipelines.
Researchers have identified sustained spikes in turbulence as the primary condition initiating soil erosion on land and in water. The team developed a method to quantify the impact of turbulence on soil erosion, which can be applied to predict particle movement and pollution spread.
A new forecasting method published by UGA scientist could help pilots chart new courses around clear air turbulence, reducing the risk of injury claims. The method uses gravity waves and a single, consistent theory to predict turbulence location.
A new grant will fund research to identify, forecast, and detect areas of clear-air turbulence, reducing anxiety for travelers. The study will also aid astronomers in using adaptive optics to reduce telescope image degradation caused by atmospheric optical turbulence.
A new turbulence detection system using NEXRAD Doppler radars provides real-time snapshots of turbulence to pilots, helping them avoid hazardous areas. The system's accuracy is reported to be high, with pilots praising its ability to provide accurate information about turbulence location and intensity.
A new study reveals that undersea mountain ranges, like the Mid-Atlantic Ridge, generate significant turbulent mixing in the Atlantic Ocean. This mixing affects the overall balance of warm and cold water temperatures, controlling the strength of the Gulf Stream and its impact on global climate patterns.
Dr. Harry L. Swinney received the Jürgen Moser Lecture Prize for his work on nonlinear dynamics of systems far from equilibrium. His research has elucidated the onset of turbulence in various systems, including water in rotating cylinders.
A team of UNH and Dartmouth researchers will develop models for controlled thermonuclear fusion and turbulence in the Sun's environment. The grant supports a new center, CICART, which aims to leverage interdisciplinary collaborations and federal funding.