fuckyeahfluiddynamics

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Beneath a River of Red

A glowing arch of red, pink, and white anchors this stunning composite astrophotograph. This is a STEVE (Strong Thermal Emission Velocity Enhancement) caused by a river of fast-moving ions high in the atmosphere.  (Image credit: L. Leroux-Géré; via APOD) Read the full article

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Inside the Squirting Cucumber

Though only 5 cm long, the squirting cucumber can spray its seeds up to 10 meters away. The little fruit does so through a clever combination of preparation and ballistic maneuvers.  (Research and image credit: F. Box et al.; via Gizmodo) Read the full article

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Glacial Tributaries

Just as rivers have tributaries that feed their flow, small glaciers can flow as tributaries into larger ones. This astronaut photo shows Siachen Glacier and four of its tributaries coming together and continuing to flow from the top to the bottom of the image.  (Image credit: NASA; via NASA Earth Observatory) Read the full article

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A Seismic Warning for the Tongan Eruption

In mid-January 2022, the Hunga Tonga-Hunga Ha’apai (HTHH) volcano had one of the most massive eruptions ever recorded, destroying an island, generating a tsunami, and blanketing Tonga in ash. (Image credit: NASA Earth Observatory; research credit: T. Horiuchi et al.; via Gizmodo and AGU News) Read the full article

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Wave Clouds in the Atacama

Striped clouds appear to converge over a mountaintop in this photo, but that's an illusion. In reality, these clouds are parallel and periodic; it's only the camera's wide-angle lens that makes them appear to converge. (Image credit: Y. Beletsky; via APOD) Read the full article

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"Paradolia"

In "Paradolia," filmmaker Susi Sie plays with pareidolia, our tendency to seek patterns in nebulous data -- like faces on a slice of toast.  (Video and image credit: S. Sie) Read the full article

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Inside a Big Cat's Roar

The roars of big cats -- tigers, lions, jaguars, and leopards -- carry long distances. In part, this reflects the animals' size: large lungs exhale lots of air through a large voice-box, whose vibrations resonate in a large throat. But size alone does not make the roar. (Image credit: tiger - T. Myburgh, voice box - E. Walsh and J. McGee; research credit: E. Walsh and J. McGee) Read the full article

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A Mini Jupiter

Astronaut Don Pettit posted this image of a Jupiter-like water globe he created on the International Space Station. In microgravity, surface tension reigns as the water's supreme force, pulling the mixture of water and food coloring into a perfect sphere. (Image credit: NASA/D. Pettit; via space.com; submitted by J. Shoer) Read the full article

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A Magnetic Tsunami Warning

Tsunamis are devastating natural disasters that can strike with little to no warning for coastlines. Often the first sign of major tsunami is a drop in the sea level as water flows out to join the incoming wave. But researchers have now shown that magnetic fields can signal a coming wave, too.  (Image credit: Jiji Press/AFP/Getty Images; research credit: Z. Lin et al.; via Gizmodo) Read the full article

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Skydiving Salamanders

The wandering salamander can spend its entire 20-year lifespan in the canopy of a coast redwood. When predators come calling, they have a special skill that helps them get away: skydiving. (Video and image credit: Deep Look; see also C. Brown) Read the full article

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Trapped in Ice

On lake bottoms, decaying matter produces methane and other gases that get caught as bubbles when the water freezes. (Image credit: J. Waider; via Colossal) Read the full article

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Growing Flexible Stalactites

Icicles and stalactites grow little by little, each layer a testament to the object's history. Here, researchers explore a similar phenomenon, grown from a dripping liquid.  (Image and research credit: B. Venkateswaran et al.; via APS Physics) Read the full article

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Predicting Droplet Sizes

Squeeze a bottle of cleaning spray, and the nozzle transforms a liquid jet into a spray of droplets. These droplets come in many sizes, and predicting them is difficult because the droplets' size distribution depends on the details of how their parent liquid broke up. (Image credit: I. Jackiw et al.; via APS Physics) Read the full article

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Reinterpreting Uranus's Magnetosphere

NASA launched the Voyager 2 probe nearly 50 years ago, and, to date, it's the only spacecraft to visit icy Uranus.  (Image credit: NASA; research credit: J. Jasinski et al.; via Gizmodo) Read the full article

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Growing Downstream

This astronaut photo shows Madagascar's largest estuary, as of 2024. On the right side, the Betsiboka River flows northwest (right to left, in the image).  (Image credit: NASA; via NASA Earth Observatory) Read the full article

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"Surfing on the Other Side"

Surfers come in many forms -- humans, robots, birds, and even honeybees. Most of the time, though, we see surfers above the water. Not so here. (Image credit: L. Fitze/BPOTY) Read the full article

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A Dandelion-Like Supernova Remnant

In 1181 CE, astronomers in China and Japan recorded a new, short-lived star in the constellation Cassiopeia. After burning for nearly six months, this historic supernova disappeared from the naked eye.  (Image and video credit: W.M. Keck Observatory/A. Makarenko; research credit: R. Fesen et al.; via Gizmodo) Read the full article