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1000 results for “fluiddyn”
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Recreating Atmospheres
In planetary atmospheres, energy and vorticity can cascade from large scales to smaller ones, but the mechanics of this transfer remain somewhat elusive. In a recent experiment, researchers built a lab-scale representation of an atmosphere using a meter-scale rotating annular tank. The outer bottom edge of the tank gets heated–representing the sun’s warming at the equator–while a pipe in the center of the tank gets cooled near the tank surface, which mimics the chilling effect of the poles. Researchers filled the tank with a water-glycerol mixture and recorded how their artificial atmosphere responded at different rotation rates.
Two different rotating atmospheres, colored by vorticity (red clockwise, blue counterclockwise). The left version has a slower rate of rotation, and thus larger length scales.The results show an energy spectrum that’s consistent with atmospheric observations–with a steep drop at large length scales and a flatter one at smaller scales. But interestingly, they also found that the cascade was temperature-dependent in ways that current models don’t predict. Untangling that effect could help us understand not only our atmosphere but those of other planets. (Image credit: tank – H. Scolan, animation – S. Ding et al.; research credit: S. Ding et al.; via APS)
#atmosphericScience #energyCascade #flowVisualization #fluidDynamics #physics #planetaryScience #rotatingFlow #science #turbulence #vorticity -
Recreating Atmospheres
In planetary atmospheres, energy and vorticity can cascade from large scales to smaller ones, but the mechanics of this transfer remain somewhat elusive. In a recent experiment, researchers built a lab-scale representation of an atmosphere using a meter-scale rotating annular tank. The outer bottom edge of the tank gets heated–representing the sun’s warming at the equator–while a pipe in the center of the tank gets cooled near the tank surface, which mimics the chilling effect of the poles. Researchers filled the tank with a water-glycerol mixture and recorded how their artificial atmosphere responded at different rotation rates.
Two different rotating atmospheres, colored by vorticity (red clockwise, blue counterclockwise). The left version has a slower rate of rotation, and thus larger length scales.The results show an energy spectrum that’s consistent with atmospheric observations–with a steep drop at large length scales and a flatter one at smaller scales. But interestingly, they also found that the cascade was temperature-dependent in ways that current models don’t predict. Untangling that effect could help us understand not only our atmosphere but those of other planets. (Image credit: tank – H. Scolan, animation – S. Ding et al.; research credit: S. Ding et al.; via APS)
#atmosphericScience #energyCascade #flowVisualization #fluidDynamics #physics #planetaryScience #rotatingFlow #science #turbulence #vorticity -
Recreating Atmospheres
In planetary atmospheres, energy and vorticity can cascade from large scales to smaller ones, but the mechanics of this transfer remain somewhat elusive. In a recent experiment, researchers built a lab-scale representation of an atmosphere using a meter-scale rotating annular tank. The outer bottom edge of the tank gets heated–representing the sun’s warming at the equator–while a pipe in the center of the tank gets cooled near the tank surface, which mimics the chilling effect of the poles. Researchers filled the tank with a water-glycerol mixture and recorded how their artificial atmosphere responded at different rotation rates.
Two different rotating atmospheres, colored by vorticity (red clockwise, blue counterclockwise). The left version has a slower rate of rotation, and thus larger length scales.The results show an energy spectrum that’s consistent with atmospheric observations–with a steep drop at large length scales and a flatter one at smaller scales. But interestingly, they also found that the cascade was temperature-dependent in ways that current models don’t predict. Untangling that effect could help us understand not only our atmosphere but those of other planets. (Image credit: tank – H. Scolan, animation – S. Ding et al.; research credit: S. Ding et al.; via APS)
#atmosphericScience #energyCascade #flowVisualization #fluidDynamics #physics #planetaryScience #rotatingFlow #science #turbulence #vorticity -
Recreating Atmospheres
In planetary atmospheres, energy and vorticity can cascade from large scales to smaller ones, but the mechanics of this transfer remain somewhat elusive. In a recent experiment, researchers built a lab-scale representation of an atmosphere using a meter-scale rotating annular tank. The outer bottom edge of the tank gets heated–representing the sun’s warming at the equator–while a pipe in the center of the tank gets cooled near the tank surface, which mimics the chilling effect of the poles. Researchers filled the tank with a water-glycerol mixture and recorded how their artificial atmosphere responded at different rotation rates.
Two different rotating atmospheres, colored by vorticity (red clockwise, blue counterclockwise). The left version has a slower rate of rotation, and thus larger length scales.The results show an energy spectrum that’s consistent with atmospheric observations–with a steep drop at large length scales and a flatter one at smaller scales. But interestingly, they also found that the cascade was temperature-dependent in ways that current models don’t predict. Untangling that effect could help us understand not only our atmosphere but those of other planets. (Image credit: tank – H. Scolan, animation – S. Ding et al.; research credit: S. Ding et al.; via APS)
#atmosphericScience #energyCascade #flowVisualization #fluidDynamics #physics #planetaryScience #rotatingFlow #science #turbulence #vorticity -
Recreating Atmospheres
In planetary atmospheres, energy and vorticity can cascade from large scales to smaller ones, but the mechanics of this transfer remain somewhat elusive. In a recent experiment, researchers built a lab-scale representation of an atmosphere using a meter-scale rotating annular tank. The outer bottom edge of the tank gets heated–representing the sun’s warming at the equator–while a pipe in the center of the tank gets cooled near the tank surface, which mimics the chilling effect of the poles. Researchers filled the tank with a water-glycerol mixture and recorded how their artificial atmosphere responded at different rotation rates.
Two different rotating atmospheres, colored by vorticity (red clockwise, blue counterclockwise). The left version has a slower rate of rotation, and thus larger length scales.The results show an energy spectrum that’s consistent with atmospheric observations–with a steep drop at large length scales and a flatter one at smaller scales. But interestingly, they also found that the cascade was temperature-dependent in ways that current models don’t predict. Untangling that effect could help us understand not only our atmosphere but those of other planets. (Image credit: tank – H. Scolan, animation – S. Ding et al.; research credit: S. Ding et al.; via APS)
#atmosphericScience #energyCascade #flowVisualization #fluidDynamics #physics #planetaryScience #rotatingFlow #science #turbulence #vorticity -
https://www.europesays.com/africa/211689/ Flow Battery Market in Africa | Report – IndexBox #Africa #ElectrodeMaterials #ElectrolyteChemistry&Formulation #EnergyStorageMarketReport #FlowBattery #forecast #GridAncillaryServices(whenDurationSuited) #IndustrialBackupPower #LongDurationGridStorage(4+Hours) #MarketAnalysis #Membrane/separatorTechnology #RenewablesFirmingAndTimeShifting #StackDesign&FluidDynamics
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Bouncing on a Wave
On a vibrating fluid, droplets can bounce and interact in complex ways. Here, researchers demonstrate some of the peculiar dynamics of these wave-guided droplets, showing how they can do things like pair up in waltzes. To keep the droplets from coalescing with one another, they perform their experiments in a pressurized chamber; the higher air pressure makes it harder for the air film between droplets to drain during a collision, making the droplets unable to coalesce. Under these conditions, the authors show that the droplet-wave system has quantum-like statistics. (Video and image credit: J. Clampett et al.)
#2025gofm #bouncingDroplets #coalescence #droplets #flowVisualization #fluidDynamics #hydrodynamicQuantumAnalogs #physics #pilotWaveHydrodynamics #quantumMechanics #science #vibration -
Bouncing on a Wave
On a vibrating fluid, droplets can bounce and interact in complex ways. Here, researchers demonstrate some of the peculiar dynamics of these wave-guided droplets, showing how they can do things like pair up in waltzes. To keep the droplets from coalescing with one another, they perform their experiments in a pressurized chamber; the higher air pressure makes it harder for the air film between droplets to drain during a collision, making the droplets unable to coalesce. Under these conditions, the authors show that the droplet-wave system has quantum-like statistics. (Video and image credit: J. Clampett et al.)
#2025gofm #bouncingDroplets #coalescence #droplets #flowVisualization #fluidDynamics #hydrodynamicQuantumAnalogs #physics #pilotWaveHydrodynamics #quantumMechanics #science #vibration -
Bouncing on a Wave
On a vibrating fluid, droplets can bounce and interact in complex ways. Here, researchers demonstrate some of the peculiar dynamics of these wave-guided droplets, showing how they can do things like pair up in waltzes. To keep the droplets from coalescing with one another, they perform their experiments in a pressurized chamber; the higher air pressure makes it harder for the air film between droplets to drain during a collision, making the droplets unable to coalesce. Under these conditions, the authors show that the droplet-wave system has quantum-like statistics. (Video and image credit: J. Clampett et al.)
#2025gofm #bouncingDroplets #coalescence #droplets #flowVisualization #fluidDynamics #hydrodynamicQuantumAnalogs #physics #pilotWaveHydrodynamics #quantumMechanics #science #vibration -
Bouncing on a Wave
On a vibrating fluid, droplets can bounce and interact in complex ways. Here, researchers demonstrate some of the peculiar dynamics of these wave-guided droplets, showing how they can do things like pair up in waltzes. To keep the droplets from coalescing with one another, they perform their experiments in a pressurized chamber; the higher air pressure makes it harder for the air film between droplets to drain during a collision, making the droplets unable to coalesce. Under these conditions, the authors show that the droplet-wave system has quantum-like statistics. (Video and image credit: J. Clampett et al.)
#2025gofm #bouncingDroplets #coalescence #droplets #flowVisualization #fluidDynamics #hydrodynamicQuantumAnalogs #physics #pilotWaveHydrodynamics #quantumMechanics #science #vibration -
Bouncing on a Wave
On a vibrating fluid, droplets can bounce and interact in complex ways. Here, researchers demonstrate some of the peculiar dynamics of these wave-guided droplets, showing how they can do things like pair up in waltzes. To keep the droplets from coalescing with one another, they perform their experiments in a pressurized chamber; the higher air pressure makes it harder for the air film between droplets to drain during a collision, making the droplets unable to coalesce. Under these conditions, the authors show that the droplet-wave system has quantum-like statistics. (Video and image credit: J. Clampett et al.)
#2025gofm #bouncingDroplets #coalescence #droplets #flowVisualization #fluidDynamics #hydrodynamicQuantumAnalogs #physics #pilotWaveHydrodynamics #quantumMechanics #science #vibration -
Coffee physics.
"It takes more than 150 people to make a cup of coffee, from farmer to barista. But if that final person makes a mistake, your precious coffee is wasted. Michael Allen investigates whether physics can help us brew smarter so we don’t waste a product that’s threatened by climate change"
https://physicsworld.com/a/coffee-with-a-splash-of-physics-how-to-make-the-most-out-of-your-brew/
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“Sidewall Symphony”
Flow visualization is both an art and science in fluid dynamics. Here, researchers were interested in studying the separation bubble that forms over a backward-facing ramp–a shape that shows up, for example, on an aircraft. In these areas, the flow over the surface separates, leaving an unsteady, recirculating bubble.
That’s the flow that researchers are visualizing here. They’ve done so by adding tiny helium-filled soap bubbles to the flow. With bright lights illuminating the bubbles, each one leaves a streak in a photograph, showing where the bubble moved during the time the camera’s shutter was open. Although images like these are beautiful, they can also be analyzed by computers to extract the underlying flow that created the image. (Image and research credit: B. Steinfurth et al.; see also here)
#2025gofm #flowVisualization #fluidDynamics #fluidsAsArt #physics #science #turbulence -
“Frozen Waves”
Photographer Jan Erik Waider is a master of capturing incredible landscape imagery. In these videos, he uses a drone to film waves in the Baltic Sea gently undulating polygonal slabs of ice on the ocean surface. The interplay of light, color, and motion looks almost surreal, but nature is better than we credit at making imagery too good to look away from. (Video and image credit: J. Waider/NorthLandscapes; via Colossal)
https://www.youtube.com/watch?v=-JQaZaUSS0E
#flowVisualization #fluidDynamics #fluidsAsArt #freezing #ice #oceanWaves #physics #science #seaIce -
Plant-based milks aren’t simple liquids. Most behave as non-Newtonian fluids, flowing more easily under stress due to tiny amounts of added gums.
A reminder that everyday fluids can hide complex physics.
#NonNewtonian #FluidDynamics #SoftMatter #EverydayPhysics #foodscience
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How do vapor bubbles behave when water is below boiling?
Laser-induced bubbles offer a controlled way to probe nucleation and collapse dynamics far from equilibrium.
#phasechange #bubbledynamics #heattransfer #FluidPhysics #fluiddynamics
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What controls the motion of self-propelled particles at interfaces?
Experiments and simulations show how Marangoni forces drive elliptical Janus particles, with dynamics strongly shaped by size and eccentricity.
🔗 https://pubs.rsc.org/en/content/articlelanding/2026/sm/d5sm01270h
#marangoni #ActiveMatter #softmatter #fluiddynamics #janusparticles
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A Fungus That Freezes Water
Although water can freeze below 0 degrees Celsius, it requires a little help–in the form of a nucleation site–to do so. Often temperatures must dip well below 0 degrees Celsius for droplets to become ice. But a new study shows that at least one fungus forms proteins that help the process along.
The proteins come from the Mortierellaceae fungal family, by way of a bacterial species some hundreds of thousands of years ago or more. In experiments, adding the fungal protein helped water freeze 10 or more degrees Celsius sooner than it otherwise would.
The authors note that there are many possible applications for this freezing additive; it could help preserve food or cells without requiring lower freezing temperatures that could damage delicate tissues. It could also serve as a cloud seeding chemical in place of toxic silver iodide particles. (Image and research credit: R. Eufemio et al.; via Gizmodo; see also V. Tech)
#biology #fluidDynamics #freezing #physics #science #supercooling -
Insect Wings in Extreme Macro
Photographer Chris Perani is fascinated by the microstructures of insect wings, which he captures in “extreme macro” through focus stacking–letting us see wings in glorious micron-scale detail. In addition to giving insects their brilliant colors and irridescence, these structures serve another key role: they help insects stay dry. In a world where contact with water is unavoidable, insects have instead evolved to trap air in the gaps of their wings, letting water slide off instead of sticking. (Image credit: C. Perani; via Colossal)
#biology #droplets #fluidDynamics #fluidsAsArt #hydrophobic #interference #physics #science #superhydrophobic #thinFilm -
Melting Can Propel Icebergs
Icebergs have long served as a metaphor for not knowing what’s going on beneath the surface. Studies like today’s are a reminder of why that is. Researchers found that asymmetric icebergs–shaped, in this case, like a right triangular prism–can self-propel as they melt. Their shape forces cold, dense meltwater to slide down the surface, generating a sinking plume that propels the ice as a whole. The team demonstrated this effect in both fresh- and saltwater. For icebergs wandering into warm waters, the effect is particularly strong and may reach levels about 10% of the magnitude of dominant propulsive forces like wind. (Image and research credit: M. Berhanu et al.; via APS)
#buoyancy #convection #flowVisualization #fluidDynamics #iceberg #melting #physics #plume #science #selfPropulsion -
Melting Can Propel Icebergs
Icebergs have long served as a metaphor for not knowing what’s going on beneath the surface. Studies like today’s are a reminder of why that is. Researchers found that asymmetric icebergs–shaped, in this case, like a right triangular prism–can self-propel as they melt. Their shape forces cold, dense meltwater to slide down the surface, generating a sinking plume that propels the ice as a whole. The team demonstrated this effect in both fresh- and saltwater. For icebergs wandering into warm waters, the effect is particularly strong and may reach levels about 10% of the magnitude of dominant propulsive forces like wind. (Image and research credit: M. Berhanu et al.; via APS)
#buoyancy #convection #flowVisualization #fluidDynamics #iceberg #melting #physics #plume #science #selfPropulsion -
Melting Can Propel Icebergs
Icebergs have long served as a metaphor for not knowing what’s going on beneath the surface. Studies like today’s are a reminder of why that is. Researchers found that asymmetric icebergs–shaped, in this case, like a right triangular prism–can self-propel as they melt. Their shape forces cold, dense meltwater to slide down the surface, generating a sinking plume that propels the ice as a whole. The team demonstrated this effect in both fresh- and saltwater. For icebergs wandering into warm waters, the effect is particularly strong and may reach levels about 10% of the magnitude of dominant propulsive forces like wind. (Image and research credit: M. Berhanu et al.; via APS)
#buoyancy #convection #flowVisualization #fluidDynamics #iceberg #melting #physics #plume #science #selfPropulsion -
Melting Can Propel Icebergs
Icebergs have long served as a metaphor for not knowing what’s going on beneath the surface. Studies like today’s are a reminder of why that is. Researchers found that asymmetric icebergs–shaped, in this case, like a right triangular prism–can self-propel as they melt. Their shape forces cold, dense meltwater to slide down the surface, generating a sinking plume that propels the ice as a whole. The team demonstrated this effect in both fresh- and saltwater. For icebergs wandering into warm waters, the effect is particularly strong and may reach levels about 10% of the magnitude of dominant propulsive forces like wind. (Image and research credit: M. Berhanu et al.; via APS)
#buoyancy #convection #flowVisualization #fluidDynamics #iceberg #melting #physics #plume #science #selfPropulsion -
Melting Can Propel Icebergs
Icebergs have long served as a metaphor for not knowing what’s going on beneath the surface. Studies like today’s are a reminder of why that is. Researchers found that asymmetric icebergs–shaped, in this case, like a right triangular prism–can self-propel as they melt. Their shape forces cold, dense meltwater to slide down the surface, generating a sinking plume that propels the ice as a whole. The team demonstrated this effect in both fresh- and saltwater. For icebergs wandering into warm waters, the effect is particularly strong and may reach levels about 10% of the magnitude of dominant propulsive forces like wind. (Image and research credit: M. Berhanu et al.; via APS)
#buoyancy #convection #flowVisualization #fluidDynamics #iceberg #melting #physics #plume #science #selfPropulsion -
Schooling at Scale
Relatively simple visual and hydrodynamic signals are enough to make digital fish school in ways that resemble living ones. Here, researchers look at what happens when well-behaved schools of fish get too big. The researchers first demonstrate that their schools behave reasonably at one hundred members, either in a schooling configuration or a group milling around a central region.
At one thousand fish, the schools are still reasonably coherent and sensible. But at fifty thousand fish, the picture is drastically different. Neither schooling nor milling groups are able to remain together. They fracture and scatter into smaller groupings. (Video and image credit: H. Hang et al.)
#2025gofm #activeMatter #biology #collectiveMotion #fish #fluidDynamics #instability #numericalSimulation #physics #schooling #science -
Schooling at Scale
Relatively simple visual and hydrodynamic signals are enough to make digital fish school in ways that resemble living ones. Here, researchers look at what happens when well-behaved schools of fish get too big. The researchers first demonstrate that their schools behave reasonably at one hundred members, either in a schooling configuration or a group milling around a central region.
At one thousand fish, the schools are still reasonably coherent and sensible. But at fifty thousand fish, the picture is drastically different. Neither schooling nor milling groups are able to remain together. They fracture and scatter into smaller groupings. (Video and image credit: H. Hang et al.)
#2025gofm #activeMatter #biology #collectiveMotion #fish #fluidDynamics #instability #numericalSimulation #physics #schooling #science -
Schooling at Scale
Relatively simple visual and hydrodynamic signals are enough to make digital fish school in ways that resemble living ones. Here, researchers look at what happens when well-behaved schools of fish get too big. The researchers first demonstrate that their schools behave reasonably at one hundred members, either in a schooling configuration or a group milling around a central region.
At one thousand fish, the schools are still reasonably coherent and sensible. But at fifty thousand fish, the picture is drastically different. Neither schooling nor milling groups are able to remain together. They fracture and scatter into smaller groupings. (Video and image credit: H. Hang et al.)
#2025gofm #activeMatter #biology #collectiveMotion #fish #fluidDynamics #instability #numericalSimulation #physics #schooling #science -
Schooling at Scale
Relatively simple visual and hydrodynamic signals are enough to make digital fish school in ways that resemble living ones. Here, researchers look at what happens when well-behaved schools of fish get too big. The researchers first demonstrate that their schools behave reasonably at one hundred members, either in a schooling configuration or a group milling around a central region.
At one thousand fish, the schools are still reasonably coherent and sensible. But at fifty thousand fish, the picture is drastically different. Neither schooling nor milling groups are able to remain together. They fracture and scatter into smaller groupings. (Video and image credit: H. Hang et al.)
#2025gofm #activeMatter #biology #collectiveMotion #fish #fluidDynamics #instability #numericalSimulation #physics #schooling #science -
Schooling at Scale
Relatively simple visual and hydrodynamic signals are enough to make digital fish school in ways that resemble living ones. Here, researchers look at what happens when well-behaved schools of fish get too big. The researchers first demonstrate that their schools behave reasonably at one hundred members, either in a schooling configuration or a group milling around a central region.
At one thousand fish, the schools are still reasonably coherent and sensible. But at fifty thousand fish, the picture is drastically different. Neither schooling nor milling groups are able to remain together. They fracture and scatter into smaller groupings. (Video and image credit: H. Hang et al.)
#2025gofm #activeMatter #biology #collectiveMotion #fish #fluidDynamics #instability #numericalSimulation #physics #schooling #science -
Scientists are creating “animate” droplets that can act, adapt, and respond on their own, blurring the line between living and non-living matter.
Could this inspire new ways to control liquids?
#softmatter #ActiveMatter #dropletphysics #AutonomousSystems #fluiddynamics