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605 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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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 -
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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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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What should fluid mechanics papers focus on today?
This editorial argues for a “physics-first” approach: beyond data and simulations, real progress comes from understanding mechanisms and scaling laws.
🔗 https://doi.org/10.1063/5.0329552
#FluidDynamics #Physics #ScientificPublishing #ResearchCulture #OpenScience
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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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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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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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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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A new perspective on pipe flow instability: not small perturbations, but energy thresholds for vortex formation may trigger turbulence in Hagen–Poiseuille flow.
#FluidDynamics #FlowInstability #Turbulence #BoundaryLayer #Physics
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A new perspective on pipe flow instability: not small perturbations, but energy thresholds for vortex formation may trigger turbulence in Hagen–Poiseuille flow.
#FluidDynamics #FlowInstability #Turbulence #BoundaryLayer #Physics
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A new perspective on pipe flow instability: not small perturbations, but energy thresholds for vortex formation may trigger turbulence in Hagen–Poiseuille flow.
#FluidDynamics #FlowInstability #Turbulence #BoundaryLayer #Physics
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A new perspective on pipe flow instability: not small perturbations, but energy thresholds for vortex formation may trigger turbulence in Hagen–Poiseuille flow.
#FluidDynamics #FlowInstability #Turbulence #BoundaryLayer #Physics
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Glacial Blues
Meltwater braids like a river delta in this gorgeous image from photographer Stuart Chape. It earned the Silver distinction from the World Nature Photography Awards in their “Planet Earth’s landscapes and environments” category. Water takes tortuous paths like these as it tries to balance the local incline, erosion, deposition, and flow rate. (Image credit: S. Chape/WNPA; via Colossal)
#fluidDynamics #fluidsAsArt #glacier #meander #physics #riverDelta #science -
When a drop or object hits water, a narrow high-speed jet can shoot upward: the Worthington jet. This study reveals universal scaling laws that govern how these jets form and evolve across different impact conditions.
🔗 https://journals.aps.org/prfluids/abstract/10.1103/2vdb-tqj6
#FluidDynamics #DropImpact #WorthingtonJet #Physics #InterfacialFlows
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When a drop or object hits water, a narrow high-speed jet can shoot upward: the Worthington jet. This study reveals universal scaling laws that govern how these jets form and evolve across different impact conditions.
🔗 https://journals.aps.org/prfluids/abstract/10.1103/2vdb-tqj6
#FluidDynamics #DropImpact #WorthingtonJet #Physics #InterfacialFlows
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When a drop or object hits water, a narrow high-speed jet can shoot upward: the Worthington jet. This study reveals universal scaling laws that govern how these jets form and evolve across different impact conditions.
🔗 https://journals.aps.org/prfluids/abstract/10.1103/2vdb-tqj6
#FluidDynamics #DropImpact #WorthingtonJet #Physics #InterfacialFlows
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When a drop or object hits water, a narrow high-speed jet can shoot upward: the Worthington jet. This study reveals universal scaling laws that govern how these jets form and evolve across different impact conditions.
🔗 https://journals.aps.org/prfluids/abstract/10.1103/2vdb-tqj6
#FluidDynamics #DropImpact #WorthingtonJet #Physics #InterfacialFlows
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“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 -
“The Haboob”
Haboobs are a dust storm driven by the strong winds at the forefront of weather fronts and thunderstorms. Those powerful winds pick up dust in arid and semi-arid landscapes, creating billowing, turbulent clouds that appear downright apocalyptic.
This particular haboob formed in Arizona in August 2025 and was caught in timelapse by photographer and storm chaser Mike Olbinski. The visuals–as always–are incredible. Definitely watch to the very end, as the haboob advances on the runway at Sky Harbor Airport. The tension is palpable as you watch flights line up and try to make it off the ground before the haboob swallows them. (Video and image credit: M. Olbinski)
#fluidDynamics #fluidsAsArt #haboob #meteorology #physics #science #timelapse #turbulence -
#FluidImage our suite for #PIV and other image algorithms in the #FluidDynamics world is at the end of the review process and will join the ranks of accepted packages by @pyOpenSci anytime soon.
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Update no. 1 from the project: Nearly all important packages were updated with Python 3.14 in the same month /season as the release. Kudos to hardwork from @PierreAugier
https://legi.grenoble-inp.fr/people/Pierre.Augier/fluiddyn-autumn-releases-and-python-314.html
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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 -
A key takeaway for LeidenForce: surface wettability radically reshapes the surface–bubble–flow coupling—smaller bubbles, higher detachment frequency, stronger vortical flows.
🔗 https://journals.aps.org/prfluids/abstract/10.1103/jvxz-8mzv
#FluidDynamics #MultiphaseFlow #InterfacialFlows #LeidenfrostEffect #wettability
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Milano Cortina 2026: Cortina Sliding Center
This year’s sliding events–bobsleigh, luge, and skeleton–will take place at the brand-new Cortina Sliding Center. Built on the site of a historic sliding track, this new venue came together in only the last couple of years. It features a state-of-the-art refrigeration system that pumps a mixture of water and ethylene glycol beneath the track surface to keep the ice properly chilled. Each section of the track is continuously monitored to optimize the flow rate, temperature, and pressure of the refrigerant to keep the track at maximum performance while minimizing environmental impact.
According to the designers, it’s the first competition track to use a glycol-based refrigeration system, which should be more sustainable than the ammonia-based systems used elsewhere. For a sense of what a run is like, check out this skeleton driver POV run from the facility’s shakedown competition last year. (Image credit: LMSteel; video credit: tuff sledding)
https://www.youtube.com/watch?v=rKGNKGrONiU
#fluidDynamics #freezing #milanocortina2026 #olympics #physics #science #sliding #sustainability #thermodynamics -
Watching Waves on the Nanoscale
It’s tough to simulate nonlinear wave dynamics, so scientists often test theories in wave flumes, where they can create more controlled waves than what we see in the wild. But conventional wave flumes are big–meters-long, complicated equipment–and can only test a small range of conditions. To reach more extreme nonlinear dynamics, researchers have turned to a chip-based approach. These 100-micron-long wave flumes carry a film of superfluid helium less than 7 nanometers thick. But despite that tiny size, the system can reach levels of nonlinearity five orders of magnitude greater than their full-sized counterparts. (Image and research credit: M. Reeves et al.; via Physics Today)
#fluidDynamics #microfluidics #nonlinearDynamics #physics #science #superfluid #waves -
Radiant Waves
Photographer Kevin Krautgartner captures the powerful waves of Western Australia from above. His latest series, Waves | Ocean Forces, features luminous turquoise waves, crystalline foam, and brilliant beaches. I could delight in staring at them for hours. Fortunately, he sells prints on his website! (Image credit: K. Krautgartner; via Colossal)
#fluidDynamics #fluidsAsArt #oceanWaves #physics #science #turbulence