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1000 results for “fluiddyn”
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A new AI approach, trained on physical equations, allows identifying the moment when a stable flow becomes unstable.
Machine learning could transform simulations in engineering, weather, and extreme events.
🔗 https://phys.org/news/2026-04-ai-method-flags-fluid-simulations.html
#FluidDynamics #MachineLearning #ComputationalPhysics #Bifurcation #leidenfrost
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A useful reminder in fluid mechanics: maximizing velocity is not the same as maximizing momentum or energy transfer. This paper explores how global mass balance constrains synthetic jet actuator performance.
🔗 https://doi.org/10.1063/5.0326035
#FluidDynamics #Physics #FlowControl #SyntheticJets #NonlinearDynamics
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📄 Study Review
Basic Science and Pathogenesis
Deep belly breathing increases fluid movement between the brain and spine by 56% compared to normal breathing. The shift in brain blood flow also increases by 41%. Fluid exchange between head and spine is 10 times larger than within the brain.
Study type: Observational -
A cornstarch-water droplet can behave like a liquid and a solid at the same time, depending on how it is stressed.
High-speed imaging reveals how these “oobleck” drops reshape on impact, highlighting the surprising physics of shear-thickening fluids.
🔗 https://www.nature.com/articles/d41586-026-01109-3
#FluidDynamics #SoftMatter #Rheology #ComplexFluids #physics
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A cornstarch-water droplet can behave like a liquid and a solid at the same time, depending on how it is stressed.
High-speed imaging reveals how these “oobleck” drops reshape on impact, highlighting the surprising physics of shear-thickening fluids.
🔗 https://www.nature.com/articles/d41586-026-01109-3
#FluidDynamics #SoftMatter #Rheology #ComplexFluids #physics
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A cornstarch-water droplet can behave like a liquid and a solid at the same time, depending on how it is stressed.
High-speed imaging reveals how these “oobleck” drops reshape on impact, highlighting the surprising physics of shear-thickening fluids.
🔗 https://www.nature.com/articles/d41586-026-01109-3
#FluidDynamics #SoftMatter #Rheology #ComplexFluids #physics
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A cornstarch-water droplet can behave like a liquid and a solid at the same time, depending on how it is stressed.
High-speed imaging reveals how these “oobleck” drops reshape on impact, highlighting the surprising physics of shear-thickening fluids.
🔗 https://www.nature.com/articles/d41586-026-01109-3
#FluidDynamics #SoftMatter #Rheology #ComplexFluids #physics
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Fluids Can Fracture
Fracture is a sudden, brittle breaking-apart that we generally associate with solid materials that get stressed too far. Some viscoelastic, non-Newtonian fluids have been known to fracture, but that was generally thought to be unusual. But a recent study turns that idea on its head, revealing that even simple, albeit highly viscous, liquids can fracture.
A viscous hydrocarbon fluid gets stretched at 100 mm/s, drawing it into a thinning shape.When you stretch a liquid, the general expectation is what you see above: the liquid gets drawn into an ever thinner shape. But researchers found that–when stretched quickly–that same simple hydrocarbon liquid cracked open:
A viscous hydrocarbon fluid gets stretched at 300 mm/s, causing it to fracture like a solid.There’s even an audible snap, which you can hear in the video below. The results were so surprising that they repeated the experiment several times and with different viscous (but Newtonian) liquids. The results held. When the liquids were pulled to a critical stress, they audibly snapped and fractured like a solid.
The next question, of course, is why this happens. The authors suspect (but have yet to show) that cavitation may be at play in the initiation of the crack that separates the liquid in two. (Image, video, and research credit: T. Lima et al.; via Gizmodo)
https://www.youtube.com/watch?v=i5TQegTyCvc
#fluidDynamics #fracture #newtonianFluids #physics #science #solidMechanics #viscousFlow -
Fluids Can Fracture
Fracture is a sudden, brittle breaking-apart that we generally associate with solid materials that get stressed too far. Some viscoelastic, non-Newtonian fluids have been known to fracture, but that was generally thought to be unusual. But a recent study turns that idea on its head, revealing that even simple, albeit highly viscous, liquids can fracture.
A viscous hydrocarbon fluid gets stretched at 100 mm/s, drawing it into a thinning shape.When you stretch a liquid, the general expectation is what you see above: the liquid gets drawn into an ever thinner shape. But researchers found that–when stretched quickly–that same simple hydrocarbon liquid cracked open:
A viscous hydrocarbon fluid gets stretched at 300 mm/s, causing it to fracture like a solid.There’s even an audible snap, which you can hear in the video below. The results were so surprising that they repeated the experiment several times and with different viscous (but Newtonian) liquids. The results held. When the liquids were pulled to a critical stress, they audibly snapped and fractured like a solid.
The next question, of course, is why this happens. The authors suspect (but have yet to show) that cavitation may be at play in the initiation of the crack that separates the liquid in two. (Image, video, and research credit: T. Lima et al.; via Gizmodo)
https://www.youtube.com/watch?v=i5TQegTyCvc
#fluidDynamics #fracture #newtonianFluids #physics #science #solidMechanics #viscousFlow -
Fluids Can Fracture
Fracture is a sudden, brittle breaking-apart that we generally associate with solid materials that get stressed too far. Some viscoelastic, non-Newtonian fluids have been known to fracture, but that was generally thought to be unusual. But a recent study turns that idea on its head, revealing that even simple, albeit highly viscous, liquids can fracture.
A viscous hydrocarbon fluid gets stretched at 100 mm/s, drawing it into a thinning shape.When you stretch a liquid, the general expectation is what you see above: the liquid gets drawn into an ever thinner shape. But researchers found that–when stretched quickly–that same simple hydrocarbon liquid cracked open:
A viscous hydrocarbon fluid gets stretched at 300 mm/s, causing it to fracture like a solid.There’s even an audible snap, which you can hear in the video below. The results were so surprising that they repeated the experiment several times and with different viscous (but Newtonian) liquids. The results held. When the liquids were pulled to a critical stress, they audibly snapped and fractured like a solid.
The next question, of course, is why this happens. The authors suspect (but have yet to show) that cavitation may be at play in the initiation of the crack that separates the liquid in two. (Image, video, and research credit: T. Lima et al.; via Gizmodo)
https://www.youtube.com/watch?v=i5TQegTyCvc
#fluidDynamics #fracture #newtonianFluids #physics #science #solidMechanics #viscousFlow -
Fluids Can Fracture
Fracture is a sudden, brittle breaking-apart that we generally associate with solid materials that get stressed too far. Some viscoelastic, non-Newtonian fluids have been known to fracture, but that was generally thought to be unusual. But a recent study turns that idea on its head, revealing that even simple, albeit highly viscous, liquids can fracture.
A viscous hydrocarbon fluid gets stretched at 100 mm/s, drawing it into a thinning shape.When you stretch a liquid, the general expectation is what you see above: the liquid gets drawn into an ever thinner shape. But researchers found that–when stretched quickly–that same simple hydrocarbon liquid cracked open:
A viscous hydrocarbon fluid gets stretched at 300 mm/s, causing it to fracture like a solid.There’s even an audible snap, which you can hear in the video below. The results were so surprising that they repeated the experiment several times and with different viscous (but Newtonian) liquids. The results held. When the liquids were pulled to a critical stress, they audibly snapped and fractured like a solid.
The next question, of course, is why this happens. The authors suspect (but have yet to show) that cavitation may be at play in the initiation of the crack that separates the liquid in two. (Image, video, and research credit: T. Lima et al.; via Gizmodo)
https://www.youtube.com/watch?v=i5TQegTyCvc
#fluidDynamics #fracture #newtonianFluids #physics #science #solidMechanics #viscousFlow -
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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You were waiting to discover the LeidenForce PhD students on video: we are launching the first episode of our series: True Force Portraits – LeidenForce talents on the boil.
This episode features Cheikh Tidiane DIOUM, PhD student recruited by @stephanedorbolo at the @UniversitedeLiege within the PtYX laboratory.
▶️ Meet Cheikh Tidiane Dioum: https://youtu.be/L1qVxEtmeH4
#LeidenForce #TrueForce #MSCA #HorizonEurope #LeidenfrostEffect #PhD #Research #Science #ResearchPortraits #FluidDynamics
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How does lava turn into hair-like glass?
Experiments show gas-rich molten rock can be stretched into thin filaments, like molten sugar. A new mechanism for the formation of “Pele’s hair”.
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Besser pinkeln: Physiker entwickeln das perfekte Urinal
Erkenntnisse aus der Fluiddynamik sollen dabei helfen, unangenehme "Splashbacks" bei Pissoirs zu verhindern. Technisch ist das gar nicht so leicht.
#Fluiddynamik #Hygiene #Lebensqualität #Medizin #Physik #Toilette #Umwelt #Urin #Urologie
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Cutting Out Canyons
Over the millennia, the Colorado River has carved some of the deepest and most dramatic canyons on our planet. This astronaut photo shows the river near its dam at Lake Powell. The strip of white edging the lake is the “bathtub ring” that shows how the water level has varied over the years. The deep canyons — over 400 meters from the Horn in the center of the photo to the river beside it — throw shadows across the landscape. To reach these depths, the Colorado River incised its path into bedrock that was tectonically uplifted. (Image credit: NASA; via NASA Earth Observatory)
#fluidDynamics #geology #geophysics #meander #physics #planetaryScience #riverBend #rivers #science
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Cutting Out Canyons
Over the millennia, the Colorado River has carved some of the deepest and most dramatic canyons on our planet. This astronaut photo shows the river near its dam at Lake Powell. The strip of white edging the lake is the “bathtub ring” that shows how the water level has varied over the years. The deep canyons — over 400 meters from the Horn in the center of the photo to the river beside it — throw shadows across the landscape. To reach these depths, the Colorado River incised its path into bedrock that was tectonically uplifted. (Image credit: NASA; via NASA Earth Observatory)
#fluidDynamics #geology #geophysics #meander #physics #planetaryScience #riverBend #rivers #science
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Cutting Out Canyons
Over the millennia, the Colorado River has carved some of the deepest and most dramatic canyons on our planet. This astronaut photo shows the river near its dam at Lake Powell. The strip of white edging the lake is the “bathtub ring” that shows how the water level has varied over the years. The deep canyons — over 400 meters from the Horn in the center of the photo to the river beside it — throw shadows across the landscape. To reach these depths, the Colorado River incised its path into bedrock that was tectonically uplifted. (Image credit: NASA; via NASA Earth Observatory)
#fluidDynamics #geology #geophysics #meander #physics #planetaryScience #riverBend #rivers #science
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Cutting Out Canyons
Over the millennia, the Colorado River has carved some of the deepest and most dramatic canyons on our planet. This astronaut photo shows the river near its dam at Lake Powell. The strip of white edging the lake is the “bathtub ring” that shows how the water level has varied over the years. The deep canyons — over 400 meters from the Horn in the center of the photo to the river beside it — throw shadows across the landscape. To reach these depths, the Colorado River incised its path into bedrock that was tectonically uplifted. (Image credit: NASA; via NASA Earth Observatory)
#fluidDynamics #geology #geophysics #meander #physics #planetaryScience #riverBend #rivers #science
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Buccaneer Archipelago
Off western Australian, hundreds of low-lying islands and coral reefs jut into the ocean as part of the Buccaneer Archipelago. Tides here have a range of nearly 12 meters, so water rips through the narrow channels as the tide ebbs and flows. These fast flows lift sediment that dyes the water a bright turquoise. (Image credit: M. Garrison; via NASA Earth Observatory)
#fluidDynamics #oceanTides #physics #satelliteImage #science #tides
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A Braided River
The Yarlung Zangbo River winds through Tibet as the world’s highest-altitude major river. Parts of it cut through a canyon deeper than 6,000 meters (three times the depth of the Grand Canyon). And other parts, like this section, are braided, with waterways that shift rapidly from season to season. The swift changes in a braided river’s sandbars come from large amounts of sediment eroded from steep mountains upstream. As that sediment sweeps downstream, some will deposit, which narrows channels and can increase their scouring. The river’s shape quickly becomes a complicated battle between sediment, flow speed, and slope. (Image credit: M. Garrison; animation credit: R. Walter; via NASA Earth Observatory)
#fluidDynamics #geophysics #physics #rivers #satelliteImage #science #sedimentTransport #sedimentation
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Ponding on the Ice Shelf
Glaciers flow together and march out to sea along the Amery Ice Shelf in this satellite image of Antarctica. Three glaciers — flowing from the top, left, and bottom of the image — meet just to the right of center and pass from the continental bedrock onto the ice-covered ocean. The ice shelf is recognizable by its plethora of meltwater ponds, which appear as bright blue areas. Each austral summer, meltwater gathers in low-lying regions on the ice, potentially destabilizing the ice shelf through fracture and drainage. This region near the ice shelf’s grounding line is particularly prone to ponding. Regions further afield (right, beyond the image) are colder and drier, often allowing meltwater to refreeze. (Image credit: W. Liang; via NASA Earth Observatory)
#fluidDynamics #geophysics #glacier #iceShelf #melting #physics #planetaryScience #satelliteImage #science
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Winter in Chicago
Fresh winter snow blankets Chicago in this satellite image. Over on Lake Michigan, ice dots the coastline out to about 20 kilometers from shore. Darker regions near land mark thinner ice being pushed outward by the wind. Further out, the ice appears white and may be thicker thanks to wind-driven ice piling up. (Image credit: M. Garrison; via NASA Earth Observatory)
#fluidDynamics #iceFormation #physics #satelliteImage #science #wind
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Icy or Rocky Giants?
On the outskirts of our solar system, two enigmatic giants loom: Uranus and Neptune. In terms of mass and size, both resemble many of the exoplanets discovered in recent years. Within our own solar system, these planets are known as “icy giants,” but a new study suggests that moniker may be wrong.
Pinning down the interior composition of a planet is tough on limited measurements. In the case of these outer planets, our main data is gravitational, recorded from visiting spacecraft. That information cannot tell us directly what the composition of a planet is, but it gives constraints for what materials could produce such a gravitational field.
In their simulation, researchers began with random interior configurations for Uranus and Neptune, then had the model iterate through configurations to simultaneously match the gravitational measurements while satisfying the thermodynamic and physical constraints of a stable planet. By repeating the process several times, the researchers created a catalog of potential interiors for Uranus and Neptune. And while some were water-rich–consistent with the “icy giant” title–others were remarkably rocky.
The team suggests that we may need to retire that moniker and consider the possibility that these worlds are more like our own than we thought. To find out which is true, we will need more spacecraft to visit our frigid neighbors, to provide new gravitational measurements and other observations. (Image credit: NASA/ESA/A. Simon/M. Wong/A. Hsu; research credit: R. Morf and L. Helled; via Physics World)
#fluidDynamics #geophysics #Neptune #numericalSimulation #physics #planetaryScience #science -
Sprites and ELVES
Although we are most familiar with the white, branching lightning caused by electrical discharge between clouds and the ground, there are many types of lightning. This fortuitous image captures two: tentacled red sprites and ring-like ELVES. Sprites extend upward from the top of a thunderstorm, in a large but weak flash that lasts only seconds. ELVES appear as a rapidly-expanding disc, thought to be caused by an energetic electromagnetic pulse moving into the ionosphere. They were first discovered in footage from a 1992 Space Shuttle mission. (Image credit: V. Binotto; via APOD)
#fluidDynamics #lightning #magnetohydrodynamics #meteorology #physics #plasma #science #sprite #thunderstorm -
How do fluids really slip on surfaces?
This study proposes a method to estimate slip length and reconstruct flow fields from limited data.
A key step to better understand flows where friction at the wall nearly vanishes.
#fluiddynamics #interfacialflows #SlipLength #hydrodynamics #physics
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Smoke Bomb
With a flurry of motion along its pectoral fin, a sting ray lifts the sand nearby and disappears into the turbid cloud. This tactic helps the animal both hide and escape. In a similar move, sting rays and other bottom-dwelling fish can bury themselves in sand.(Image credit: Y. Coll/OPOTY; via Colossal)
#fluidDynamics #fluidsAsArt #physics #science #sedimentTransport #sedimentation #stingray #turbulence
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Laminar flow in the sink
#FluidDynamics #LaminarFlow -
“Quiet Pulse” and “Another World”
Light shines dimly through the wall of an ice cave in this photograph by Marie-Line Dentler. Shaped by melting, pressure, freezing, and fracture, these structures are dynamic and ethereal. (Image credit: M. Dentler; via Colossal)
#fluidDynamics #fluidsAsArt #freezing #geophysics #iceFormation #melting #physics #science
