Articles tagged with Turbulence
The 76th annual meeting of the American Physical Society's Division of Fluid Dynamics will bring together over 3,500 scientists from around the world to present new research on fluid dynamics. The conference will feature a scientific program with over 3,200 presentations and a gallery of fluid motion visual arts competition.
Researchers found a 27% decrease in mean friction and a 9% reduction in energy demand through pulsating pumping similar to the human heart. This approach could lead to less costly modifications than pipe wall changes or actuators, benefiting industrial applications.
Scientists explore ultracold quantum gas to understand wave turbulence, discovering a universal relation that describes the state's characteristics regardless of external factors. The findings echo the universality of the ideal gas law for equilibrium states, opening up new avenues for understanding non-equilibrium systems.
A research group from Nagoya University simulated clear air turbulence using Japan's fastest supercomputer. They found that wind speed disturbances occur due to the collapse of Kelvin-Helmholtz instability waves, creating turbulence in the absence of visible clouds or other atmospheric disturbances.
Scientists at Max Planck Institute for Dynamics and Self-Organization have challenged long-held assumptions about turbulent flows, finding deviations from established scaling laws in highly idealized environments. This discovery has implications for understanding turbulence in engineered flows, weather forecasts, and climate models.
Researchers created an isolated turbulent blob by firing vortex rings into a tank of water, allowing precise tracking of its parameters. This breakthrough enables scientists to study real-world turbulence more effectively, exploring questions about dissipation, expansion, and energy spread across scales.
A new study reveals that clear-air turbulence has increased in various regions around the world due to climate change. Turbulence durations have risen by 17-55%, with the North Atlantic experiencing the largest increases, impacting flights and passenger safety.
Researchers studied termite mounds to develop efficient ventilation systems for buildings. The 'egress complex' network enhances air flow, heat, and moisture exchange, maintaining a balanced temperature and humidity inside. This design enables wind-powered ventilation with minimal energy consumption.
Researchers at the University of Missouri have developed a smart material prototype that can control the direction and intensity of energy waves. This breakthrough could have significant implications for various fields, including military and commercial applications.
Researchers found turbulent convection powers flows with solid bodies, moving in two directions and rotating together. The study sheds light on the interaction between fluids and solids, offering insights into Earth's inner core and thermal convection.
Three-dimensional simulations of elastoviscoplastic fluids revealed novel insights into energy transfer mechanisms across different scales. The findings showed a homogeneous, isotropic turbulence with plastic effects altering turbulent behavior.
Researchers at Chalmers University of Technology have developed a unique method to reduce ship aerodynamic drag, which could lead to significant energy efficiency gains and reduced fuel consumption. The method uses the Coanda effect to create a more efficient airflow around the ship's superstructure, reducing drag by 7.5%.
A new mathematical model predicts turbulence and heat transport in fusion plasmas with high accuracy, approximately 1,500 times faster than conventional large-scale nonlinear calculations. This breakthrough accelerates fusion research and expands the range of applicability.
Researchers at Lancaster University have discovered how energy disappears in quantum turbulence, a crucial step towards mastering this phenomenon and its applications. The study reveals the role of Kelvin waves in transferring energy from macroscopic to microscopic length scales.
Researchers at Aalto University have made significant progress in understanding quantum wave turbulence by studying its behavior in ultra-low temperature refrigerators. They found that Kelvin waves transfer energy from macroscopic to microscopic scales, confirming a theoretical prediction about dissipation of energy at small scales.
Assistant Professor Samik Bhattacharya is studying bird wing morphing to engineer stable solutions for unmanned aerial vehicles and micro air vehicles. His research could lead to improved control during airflow disturbances, reducing anxiety for pilots.
A new pumping strategy has been developed to slash energy costs of fluid transport by up to 22%. By switching pumps on and off, turbulent flows can be reduced, resulting in more efficient fluid transport. This approach could bring significant economic and environmental benefits, particularly for the transition to green energy.
Researchers from University of the Witwatersrand developed a new approach to studying complex light in complex systems. They found distortion-free forms of structured light that emerge undistorted from noisy channels, unlike other forms of structured light which become unrecognizable. This breakthrough has the potential to pave the wa...
Scientists develop eigenmodes of structured light that remain undistorted even in turbulent channels, enabling robust transmission through noisy media. This breakthrough paves the way for future work in quantum light communication and imaging through complex systems.
A team of researchers from The University of Tokyo created a computer simulation to study the phase separation of counter-rotating particles in a fluid. They found that nonlinear turbulent effects lead to the sudden separation of particles into regions of clockwise and counterclockwise collections.
The proposed project relies on Tensor Network Theory (TNT) to calculate multidimensional problems, offering a less expensive and intensive method than standard computing. Researchers aim to successfully simulate turbulence in compressible fluids and combustion chemical reactions.
New signal-processing algorithms have been shown to help mitigate the impact of turbulence in free-space optical experiments. The researchers achieved record results using commercially available photonic lanterns and a spatial light modulator to emulate turbulence.
Researchers have discovered that the flight patterns of birds can be used to estimate fine-scale environmental conditions and turbulence levels. The team measured bird altitude and motion using GPS and data loggers attached to pigeons, finding a correlation between the birds' behavior and turbulence strength.
Researchers at the University of Oldenburg have developed a new statistical model that accurately describes wind turbulence and generates fully three-dimensional wind fields using limited measurement points. This breakthrough enables precise wind turbine load estimation and improves wind farm planning, with applications in various fiel...
Researchers used machine learning to track turbulent structures in fusion reactors, gaining detailed information on their behavior and heat flows. The approach enables more accurate engineering requirements for reactor walls and could lead to improved energy efficiency.
A team of researchers used clear mud to study turbulence in water flows, discovering that low clay concentrations alter the structure of turbulent dynamics. This finding has implications for understanding sediment transport and predicting flow behavior in natural environments.
Researchers create new 'roadmap' for turbulence by analyzing weak turbulent flow between two independently rotating cylinders. They discover that turbulence follows a predictable pattern of recurrent solutions, which explain the emergence of coherent structures in turbulent flows.
Researchers developed a new minimal model to understand puffs and slugs using ecological methods, recapitulating turbulent behavior in pipe and Taylor-Couette flow. The model shows how fluid energy flow near laminar-turbulent transition can be represented as predator-prey dynamics.
Researchers from Aarhus University are developing a new approach to turbulence modelling using physics-constrained machine learning to accurately simulate complex turbulent systems. The goal is to reduce computational costs while maintaining accuracy, enabling more efficient designs and predictions in various fields.
Researchers from Politecnico di Milano have developed a programmable photonic processor that can separate and distinguish optical beams even if they are superimposed. This device allows for high-capacity wireless communication, with transmission rates of over 5000 GHz.
A new model developed by FSU researchers predicts the spread of vortices in superfluids, shedding light on a key aspect of turbulence in quantum fluids. The study also validates previous experimental results and provides evidence for the physical mechanism underlying vortex superdiffusion.
Researchers at Lancaster University have created a camera-like device that captures images of mini whirlpools in quantum liquids for the first time. The camera uses particle-like disturbances to take pictures of collections of vortices, which are unpredictable and form in specific patterns above a vibrating wire.
Researchers at HZDR simulated liquid metal flow behavior and found that turbulence under certain conditions leads to reduced heat transport. This finding has implications for battery technology and our understanding of the Earth's core.
Researchers at NIFS have made a groundbreaking discovery in fusion plasmas, finding that turbulence moves faster than heat. This characteristic allows for predictive control of plasma temperature, paving the way for real-time manipulation. The study used advanced instruments to measure turbulent behavior with unprecedented accuracy.
Researchers conducted wave-optics simulations to study the impact of turbulence on light beams, finding that branch point density grows non-linearly with grid resolution. The study's results could lead to more accurate modeling and improved performance in Adaptive Optics systems.
A team of scientists has developed a solution to accurately simulate how the atmosphere works by linking large- and small-scale simulations. This helps model winds, transport of pollutants, climate projections, and weather forecasts with greater accuracy.
A new study has shown that increased levels of turbulence and mixing occurred every night in a coastal bay, similar to those caused by storms. The researchers attribute the signal to shoals of fish spawning anchovies, which mix water layers and impact temperature distribution, nutrients, and oxygen.
Researchers have discovered that magnetic fluctuations can reduce heat load on fusion devices by propagating turbulence. This breakthrough enables a new method for controlling turbulence and maintaining high central temperatures in the plasma.
Researchers have solved a key part of the coronal heating problem by merging two previous theories into one. The study used six-dimensional supercomputer simulations to show how turbulence creates magnetic waves that heat the gas in the Sun's atmosphere.
A $763,930 NSF CAREER Award is supporting OU meteorologist Scott Salesky's project to improve cloud representation in weather and climate models. The research aims to better understand interactions between turbulence and clouds, with potential applications for predicting precipitation and understanding Earth's climate.
Researchers at TU Darmstadt and Universitat Politècnica de València used HPC resources to develop a new symmetry-based turbulence theory, resolving the closure problem of turbulence. This approach allows for reduced computational grid size and direct access to mean values like air pressure and speed.
Researchers at Texas Tech University use supercomputers to analyze the dynamics of vortices and turbulence, finding that reconnection can lead to the formation of new structures. The study aims to improve fuel efficiency for cars and develop energy-saving aircraft designs.
A computational analysis of billions of tweets has uncovered high-resolution timelines of the major stories surrounding Trump's presidency from 2016 to 2021. The study found that turbulence in these stories varied over time, with dominant narratives emerging for longer periods during certain periods.
Researchers, led by UC Santa Barbara professor Björn Birnir and the University of Oslo's Luiza Angheluta, have published a complete description of boundary layer turbulence. The theory unites empirical observations with the Navier-Stokes equation into a mathematical formula.
A new study has shown how climate change impacts the ecosystems of large lakes by varying their water layers' mixing through seasons. Mixing controls heat, oxygen, nutrients, and pollutants between layers, shaping ecosystems' adaptations.
A new experimental method tracks the motion of fibers instead of particles to reveal previously hidden information about turbulent flows. The researchers developed an innovative solution using rigid fibers, which allowed them to measure the speed and direction of flow at two points a fixed distance apart.
Researchers developed a new model to study turbulent puffs, revealing the impact of temperature and humidity on turbulence. The findings suggest that buoyancy plays a significant role in shaping the behavior of tiny fluctuations within the puff, which can affect the movement of airborne droplets.
Researchers used high-performance computing to study turbulent jet flames, improving combustion models by understanding intermittency in turbulence simulations. This work focuses on the smallest structures of turbulence and its implications for engineering goals like aerospace technologies and power plants.
Researchers found that small pockets of virus-laden air can detach from an exhaled breath and travel in a ballistic manner, reaching large distances. This phenomenon is known as the butterfly effect, where miniscule initial variations are amplified by turbulence.
A Cornell University-led study reveals that birds can use turbulence to their advantage, offering a potential boost to the aerospace industry. The research found that birds' accelerations are highly irregular and fluctuating, similar to particles in turbulent airflows, allowing them to harness energy from wind speed.
Researchers have found that Tesla's patented valve can control flows and generate turbulence at low speeds, making it a potential alternative to conventional check valves. The device can harness vibrations in engines to pump fuel, coolant, lubricant, or other gases and liquids.
Lancaster physicists create novel method using nanoscience to detect individual quantum vortices in superfluid helium, revealing simpler dynamics than classical turbulence. This breakthrough could provide clues on solving the Navier-Stokes Equations, governing fluid flow.
Researchers at Florida State University have visualized the motion of vortices in superfluid helium-4, a quantum fluid that exists at extremely low temperatures. The study revealed that as vortex tubes appeared, they moved randomly and rapidly away from their starting point, exhibiting superdiffusion.
On calm days, sunlight warms the ocean surface in tropical oceans, driving atmospheric turbulence and affecting weather patterns. Researchers from Oregon State University used Doppler lidar technology to collect unprecedented measurements of turbulence over the ocean, revealing that such events occur during about 5% of days.
Research on the Loess Plateau's complex terrain explores how atmospheric stability influences turbulence measurement ergodicity. Steadiness of various-scale turbulence distribution is key to satisfying ergodicity, with relatively easy satisfaction at weakly stable stratifications.
A new turbulence model can simulate entire vortex collision events up to 100 times faster than current state-of-the-art techniques. This allows engineers to design better aircraft and weapon systems without waiting months for supercomputer calculations.
Researchers have discovered turbulent-like dynamics in the human brain using fMRI, suggesting a new way to analyze and model whole-brain dynamics. This finding could lead to improved mental health treatments for neuropsychiatric diseases.
Researchers simulate turbulence on both sides of sonic scale using LRZ HPC resources, capturing large-scale phenomena and advancing star formation models. The team's largest-ever simulation resolves the sonic scale for the first time, improving predictions of star formation rates and molecular cloud behavior.
Researchers at the University of Illinois developed a new method that combines machine learning and physics to simulate turbulent flow, allowing for more accurate predictions in aerospace engineering. This method has the potential to improve design efficiency and reduce costs in industries such as air travel and spacecraft development.
Researchers investigate the purple and green emissions of STEVE, discovering tiny streaks that could be moving points of light. The findings suggest the green features are caused by turbulence in plasma at high altitudes.