Search
1000 results for “fluiddyn”
-
Inside Solidification
As children, we’re taught that there are three distinct phases of matter–solid, liquid, and gas–but the reality is somewhat more complicated. In the right–often exotic–conditions, there are far more phases matter takes on. In a recent study, researchers described a metal that sits somewhere between a liquid and a solid.
In a liquid, atoms are free to move. During solidification, atoms lose this freedom, and their frozen positions relative to one another determine the solid’s properties. Atoms frozen into orderly patterns form crystals, whereas those frozen haphazardly become amorphous solids. In their experiment, researchers instead observed atoms in liquid metal nanoparticles that remained stationary throughout the transition from liquid to solid. The number and position of stationary atoms affected whether the final solid crystallized or not.
By tracking these stationary atoms and their influence, the team hopes to better control the material properties of the final solidified metal. (Image credit: U. of Nottingham; research credit: C. Leist et al.; via Gizmodo)
#amorphousSolid #fluidDynamics #materialScience #phaseChange #physics #science #solidification -
Inside Solidification
As children, we’re taught that there are three distinct phases of matter–solid, liquid, and gas–but the reality is somewhat more complicated. In the right–often exotic–conditions, there are far more phases matter takes on. In a recent study, researchers described a metal that sits somewhere between a liquid and a solid.
In a liquid, atoms are free to move. During solidification, atoms lose this freedom, and their frozen positions relative to one another determine the solid’s properties. Atoms frozen into orderly patterns form crystals, whereas those frozen haphazardly become amorphous solids. In their experiment, researchers instead observed atoms in liquid metal nanoparticles that remained stationary throughout the transition from liquid to solid. The number and position of stationary atoms affected whether the final solid crystallized or not.
By tracking these stationary atoms and their influence, the team hopes to better control the material properties of the final solidified metal. (Image credit: U. of Nottingham; research credit: C. Leist et al.; via Gizmodo)
#amorphousSolid #fluidDynamics #materialScience #phaseChange #physics #science #solidification -
The Hydrostatic Paradox
Engineering classes often discuss hydrostatics–the physics of non-moving water–before they cover fluid dynamics and its flows. But hydrostatics is plenty challenging on its own, as Steve Mould demonstrates in this video looking at how hydrostatic pressure depends on depth (and, not, as our intuition might suggest, on shape). As always, he has some nice countertop-scale demos to go with it. (Video and image credit: S. Mould)
#DIYFluids #fluidDynamics #hydrostaticPressure #hydrostatics #physics #science -
The Hydrostatic Paradox
Engineering classes often discuss hydrostatics–the physics of non-moving water–before they cover fluid dynamics and its flows. But hydrostatics is plenty challenging on its own, as Steve Mould demonstrates in this video looking at how hydrostatic pressure depends on depth (and, not, as our intuition might suggest, on shape). As always, he has some nice countertop-scale demos to go with it. (Video and image credit: S. Mould)
#DIYFluids #fluidDynamics #hydrostaticPressure #hydrostatics #physics #science -
The Hydrostatic Paradox
Engineering classes often discuss hydrostatics–the physics of non-moving water–before they cover fluid dynamics and its flows. But hydrostatics is plenty challenging on its own, as Steve Mould demonstrates in this video looking at how hydrostatic pressure depends on depth (and, not, as our intuition might suggest, on shape). As always, he has some nice countertop-scale demos to go with it. (Video and image credit: S. Mould)
#DIYFluids #fluidDynamics #hydrostaticPressure #hydrostatics #physics #science -
The Hydrostatic Paradox
Engineering classes often discuss hydrostatics–the physics of non-moving water–before they cover fluid dynamics and its flows. But hydrostatics is plenty challenging on its own, as Steve Mould demonstrates in this video looking at how hydrostatic pressure depends on depth (and, not, as our intuition might suggest, on shape). As always, he has some nice countertop-scale demos to go with it. (Video and image credit: S. Mould)
#DIYFluids #fluidDynamics #hydrostaticPressure #hydrostatics #physics #science -
Lung Flows
When a fluid coats the inner walls of a cylinder, it can move downward in what’s called a collar flow. In our airways, a sinking collar flow can thicken as it falls, eventually blocking the airway completely.
In a Newtonian fluid, this thickening during motion is essentially unavoidable; any small disturbance to the fluid will make its thickness change. But in a viscoplastic fluid–one more akin to the mucus in our airways–researchers found that, below a critical film thickness, the collar flow won’t thicken to form a blockage. (Image and research credit: J. Shemilt et al.; via APS)
#biology #fluidDynamics #instability #physics #science #viscoplasticity -
Triggered by yesterday's discussion about old fluid sims, a short thread with some more examples from that period 2007-2009 to explore fluid dynamics for marbling (well, this one here is more like entering hot "fire" terrain 🥵)...
3/3
#FluidSim #FluidDynamics #Simulation #Marbling #GenerativeArt
-
Triggered by yesterday's discussion about old fluid sims, a short thread with some more examples from that period 2007-2009 to explore fluid dynamics for marbling (well, this one here is more like entering hot "fire" terrain 🥵)...
3/3
#FluidSim #FluidDynamics #Simulation #Marbling #GenerativeArt
-
Triggered by yesterday's discussion about old fluid sims, a short thread with some more examples from that period 2007-2009 to explore fluid dynamics for marbling (well, this one here is more like entering hot "fire" terrain 🥵)...
3/3
#FluidSim #FluidDynamics #Simulation #Marbling #GenerativeArt
-
Triggered by yesterday's discussion about old fluid sims, a short thread with some more examples from that period 2007-2009 to explore fluid dynamics for marbling (well, this one here is more like entering hot "fire" terrain 🥵)...
3/3
#FluidSim #FluidDynamics #Simulation #Marbling #GenerativeArt
-
Triggered by yesterday's discussion about old fluid sims, a short thread with some more examples from that period 2007-2009 to explore fluid dynamics for marbling...
2/3
#FluidSim #FluidDynamics #Simulation #Marbling #GenerativeArt
-
Triggered by yesterday's discussion about old fluid sims, a short thread with some more examples from that period 2007-2009 to explore fluid dynamics for marbling...
2/3
#FluidSim #FluidDynamics #Simulation #Marbling #GenerativeArt
-
Triggered by yesterday's discussion about old fluid sims, a short thread with some more examples from that period 2007-2009 to explore fluid dynamics for marbling...
2/3
#FluidSim #FluidDynamics #Simulation #Marbling #GenerativeArt
-
Triggered by yesterday's discussion about old fluid sims, a short thread with some more examples from that period 2007-2009 to explore fluid dynamics for marbling...
2/3
#FluidSim #FluidDynamics #Simulation #Marbling #GenerativeArt
-
Triggered by yesterday's discussion about old fluid sims, a short thread with some more examples from that period 2007-2009 to explore fluid dynamics for marbling...
1/3
(cc/ @noah)
#FluidSim #FluidDynamics #Simulation #Marbling #GenerativeArt
-
Triggered by yesterday's discussion about old fluid sims, a short thread with some more examples from that period 2007-2009 to explore fluid dynamics for marbling...
1/3
(cc/ @noah)
#FluidSim #FluidDynamics #Simulation #Marbling #GenerativeArt
-
Triggered by yesterday's discussion about old fluid sims, a short thread with some more examples from that period 2007-2009 to explore fluid dynamics for marbling...
1/3
(cc/ @noah)
#FluidSim #FluidDynamics #Simulation #Marbling #GenerativeArt
-
Triggered by yesterday's discussion about old fluid sims, a short thread with some more examples from that period 2007-2009 to explore fluid dynamics for marbling...
1/3
(cc/ @noah)
#FluidSim #FluidDynamics #Simulation #Marbling #GenerativeArt
-
Panama’s Missing Pacific Upwelling
Strong seasonal winds blowing from the Atlantic typically push water away from Panama’s Pacific coast, allowing deeper, colder waters to rise up. This upwelling cools reefs and feeds phytoplankton blooms, both of which support the rich marine life found there. But in early 2025, the upwelling didn’t occur.
Normally, coastal ocean temperatures drop to about 19 degrees Celsius during upwelling. Instead, temperatures only reached 23.3 degrees at their coolest. Wind seems to be the missing ingredient: winds from the Atlantic side were short-lived and 74% less frequent than in typical years.
That lack of upwelling is expected to carry consequences to Panama’s economy. About 95% of the country’s fishing catch comes from the Pacific side, so any drop in fish populations will be felt. The open question remains: was the missing upwelling a singular extreme event or a harbinger of a new normal? (Image credit: R. Heuvel; research credit: A. O’Dea et al.; via Eos)
#atmosphericScience #fluidDynamics #oceanography #physics #planetaryScience #science #upwelling -
“Legends of the Falls”
Strong winds blew curtains of mist across Skógafoss in this image of nesting northern fulmars by photographer Stefan Gerrits. Despite water’s high density compared to air, fine droplets are able to stay aloft for long periods, given the right breeze. Mists, fogs, and sea spray can float surprising distances; droplets exhaled from our lungs can persist even farther. (Image credit: S. Gerrits; via Colossal)
#droplets #fluidDynamics #fluidsAsArt #physics #science -
Marangoni Bursting With Surfactants
A few years ago, researchers described how an alcohol-water droplet atop an oil bath could pull itself apart through surface tension forces. Dubbed Marangoni bursting, this phenomena has shown up several times since. Here, researchers explore a twist on the behavior by adding surfactants to see how they affect the bursting phenomenon. (Video and image credit: K. Wu and H. Stone; via GFM)
#flowVisualization #fluidDynamics #instability #MarangoniBursting #physics #science #surfaceTension #surfactant
-
Marangoni Bursting With Surfactants
A few years ago, researchers described how an alcohol-water droplet atop an oil bath could pull itself apart through surface tension forces. Dubbed Marangoni bursting, this phenomena has shown up several times since. Here, researchers explore a twist on the behavior by adding surfactants to see how they affect the bursting phenomenon. (Video and image credit: K. Wu and H. Stone; via GFM)
#flowVisualization #fluidDynamics #instability #MarangoniBursting #physics #science #surfaceTension #surfactant
-
Marangoni Bursting With Surfactants
A few years ago, researchers described how an alcohol-water droplet atop an oil bath could pull itself apart through surface tension forces. Dubbed Marangoni bursting, this phenomena has shown up several times since. Here, researchers explore a twist on the behavior by adding surfactants to see how they affect the bursting phenomenon. (Video and image credit: K. Wu and H. Stone; via GFM)
#flowVisualization #fluidDynamics #instability #MarangoniBursting #physics #science #surfaceTension #surfactant
-
Marangoni Bursting With Surfactants
A few years ago, researchers described how an alcohol-water droplet atop an oil bath could pull itself apart through surface tension forces. Dubbed Marangoni bursting, this phenomena has shown up several times since. Here, researchers explore a twist on the behavior by adding surfactants to see how they affect the bursting phenomenon. (Video and image credit: K. Wu and H. Stone; via GFM)
#flowVisualization #fluidDynamics #instability #MarangoniBursting #physics #science #surfaceTension #surfactant
-
In Deep Lakes, Mixing is Disappearing
With a depth of nearly 600 meters, Crater Lake in Oregon is the deepest lake in the United States. It’s known for its brilliant blue hue and startling clarity. But, like other deep lakes, Crater Lake is changing as temperatures warm. It’s edging ever closer to a day where its deep, cold waters no longer mix.
Although the details of mixing vary from lake to lake, older records show that most deep lakes would overturn and fully mix on a frequency that ranged from twice a year to every seven years. This overturning happens when winds push frigid, near-frozen water. As that water approaches the shoreline, it gets forced downward, where the pressure at depth makes the cold water denser still, causing it to sink beneath the warmer water layer near the lake bottom. That kicks off larger-scale mixing that redistributes oxygen, nutrients, and toxins in the lake.
When this regular mixing stops, the entire ecosystem gets affected. Over time, oxygen gets depleted in deeper in the lake, leaving a dead zone unable to support fish and other aquatic life. Meanwhile, longer and warmer growing seasons favor phytoplankton and algae that cloud the waters and disrupt a lake’s unique ecology.
For a much more detailed look at deep lake mixing and the changes we’re seeing, check out this article over at Quanta Magazine. It’s a longer read but well worth your time. (Image credit: N. Perez Aguilar; see also: Quanta Magazine)
#biology #fluidDynamics #lakes #mixing #physics #science #stratification
-
Shining in the Sky
Shades of blue, green, and purple light the Icelandic sky in this image from December 2023. Incoming solar wind particles hit oxygen and nitrogen atoms high in the atmosphere, exciting their electrons and creating this distinctive glow. We’re currently near the peak of our Sun’s 11-year solar cycle, meaning that high numbers of sunspots and outbursts will continue, likely giving us more stunning auroras like this one. (Image credit: J. Zhang; via APOD)
An aurora in shades of blue, green, and purple.P.S. – This post–this one right here–is FYFD’s 4000th post! When I started this blog back in 2010 as a graduate student, I never imagined that I would have so much to write about the physics of fluids. But this subject is one that just keeps on giving, so I keep on writing. Thanks for joining the fun! – Nicole
#aurora #fluidDynamics #magnetohydrodynamics #physics #plasma #science #solarWind
-
“Magnetic Vortex”
The Macro room team is back with a video featuring their signature colorful cleverness. This time they’re using a magnetic stirrer to swirl up some mesmerizing flows. It’s well worth a watch. (Video and image credit: Macro Room)
#flowVisualization #fluidDynamics #fluidsAsArt #physics #science #vortex
-
The Start of a Supernova
Stars about eight times more massive than our sun end their lives in supernovas, incredible explosions that rip the star apart. The earliest stages of this explosion are something we’ve never observed firsthand, until now. A new study reports observations of the supernova explosion SN 2024ggi, detected here on Earth on 10 April 2024. Only 26 hours later, researchers pointed the Very Large Telescope at it, capture data that revealed its oblong shape as the initial explosion reached the star’s surface.
What you see above and below are not the actual supernova. They are an artist’s conception of the event, based on the researchers’ observation data. That data is enough to rule out several existing supernova models and will no doubt guide new models of star death going forward. (Image credit: ESO/L. Calçada; research credit: Y. Yang et al.; via Gizmodo)
https://www.youtube.com/watch?v=KPbOu83mKWc
#astrophysics #fluidDynamics #instability #physics #science #stellarEvolution #supernova
-
Whorls of Sea Ice
Fresh snow shines white on the southern end of Greenland in this satellite image, taken in late February 2025. Whorls of sea ice sit off the coast, where they trace out patterns that reflect the winds and ocean currents of the region. Arctic sea ice typically reaches its largest extent by early March before experiencing a long season of melting. Both the presence and absence of sea ice have a large effect on the Arctic regions. Sea ice helps dampen wave activity; without it, seas are higher and more dynamic, creating more aerosols that seed cloud cover in the Arctic and elsewhere. (Image credit: L. Dauphin; via NASA Earth Observatory)
#climateChange #fluidDynamics #oceanCurrents #physics #satelliteImage #science #seaIce