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#convection — Public Fediverse posts

Live and recent posts from across the Fediverse tagged #convection, aggregated by home.social.

  1. 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
  2. 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
  3. 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
  4. 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
  5. 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
  6. Bioconvection

    Convection isn’t always driven by temperature. Here, researchers explore the convective patterns formed by Thiovulum bacteria. These bacteria are negatively buoyant, meaning they will sink if they aren’t swimming. They also have an asymmetric moment of inertia, so any flow moving past them tends to affect their swimming direction.

    When let loose in a Hele-Shaw cell with a oxygen levels that decrease with depth, the bacteria create complex convection-like patterns. They swim slowly upward in wide, slow plumes and sink in denser, narrow plumes. In other areas, they form large-scale rotating vortices. (Video and image credit: O. Kodio et al.)

    #2025gofm #bioconvection #biology #convection #flowVisualization #fluidDynamics #physics #science
  7. Aging Salty Ice

    When ice forms in salty water, it starts out mushy and porous. Salt does not freeze neatly into ice’s crystalline structure, so the forming ice has pores and gaps where salty brine gathers. As the ice ages, more brine is pushed out and gradually convects downward, due to its greater density. Over time, this makes the ice layer thinner but more solid, with fewer pores. You can see a timelapse of the process in a laboratory experiment below. (Image credit: sea ice – C. Matias, experiment – F. Wang et al.; research credit: F. Wang et al.)

    #convection #fluidDynamics #freezing #ice #iceFormation #physics #porosity #porousFlow #science #seaIce
  8. Aging Salty Ice

    When ice forms in salty water, it starts out mushy and porous. Salt does not freeze neatly into ice’s crystalline structure, so the forming ice has pores and gaps where salty brine gathers. As the ice ages, more brine is pushed out and gradually convects downward, due to its greater density. Over time, this makes the ice layer thinner but more solid, with fewer pores. You can see a timelapse of the process in a laboratory experiment below. (Image credit: sea ice – C. Matias, experiment – F. Wang et al.; research credit: F. Wang et al.)

    #convection #fluidDynamics #freezing #ice #iceFormation #physics #porosity #porousFlow #science #seaIce
  9. Aging Salty Ice

    When ice forms in salty water, it starts out mushy and porous. Salt does not freeze neatly into ice’s crystalline structure, so the forming ice has pores and gaps where salty brine gathers. As the ice ages, more brine is pushed out and gradually convects downward, due to its greater density. Over time, this makes the ice layer thinner but more solid, with fewer pores. You can see a timelapse of the process in a laboratory experiment below. (Image credit: sea ice – C. Matias, experiment – F. Wang et al.; research credit: F. Wang et al.)

    #convection #fluidDynamics #freezing #ice #iceFormation #physics #porosity #porousFlow #science #seaIce
  10. Aging Salty Ice

    When ice forms in salty water, it starts out mushy and porous. Salt does not freeze neatly into ice’s crystalline structure, so the forming ice has pores and gaps where salty brine gathers. As the ice ages, more brine is pushed out and gradually convects downward, due to its greater density. Over time, this makes the ice layer thinner but more solid, with fewer pores. You can see a timelapse of the process in a laboratory experiment below. (Image credit: sea ice – C. Matias, experiment – F. Wang et al.; research credit: F. Wang et al.)

    #convection #fluidDynamics #freezing #ice #iceFormation #physics #porosity #porousFlow #science #seaIce
  11. Inside Cepheid Variable Stars

    Cepheid variable stars pulsate in brightness over regular periods. That’s one reason astronomers use them as a standard candle to judge distances–even for stars well outside our galaxy. In this image, researchers display a simulation of convection inside a Cepheid eight times more massive than our sun. The colors represent vorticity, with zero vorticity in white.(Image credit: M. Stuck and J. Pratt)

    #2025gofm #astrophysics #CFD #computationalFluidDynamics #convection #flowVisualization #fluidDynamics #numericalSimulation #physics #science
  12. Jupiter in a Lab

    The vivid bands of a gas giant like Jupiter come from the planet’s combination of rotation and convection. It’s possible to create the same effect in a lab by rapidly spinning a tank of water around a central ice core. That’s the physical set-up behind this research poster–note the illustration in the lower right corner. The central snapshots show how temperature gradients on the water surface change the faster the tank rotates. At higher rotational speeds, the parabolic water surface gets ever steeper and Jupiter-like temperature bands form. (Image credit: C. David et al.)

    #2025gofm #atmosphericScience #convection #flowVisualization #fluidDynamics #Jupiter #physics #planetaryScience #rotatingFlow #science #turbulence
  13. We will be hosting the 10th International #Conference on Rayleigh-Bénard #Turbulence in #Lyon (1-5 June 2026) !
    Abstract submissions are now opened.

    The aim of the conference is to bring together researchers from different fields to explore the latest advancements in high Rayleigh number #convection. A full day will review critical connections between #turbulent #thermal #convection and #geophysical processes.

    More information on rbc2026.sciencesconf.org

    #science

  14. “Vorticity 6”

    It’s time for another storm-chasing timelapse from photographer Mike Olbinski! “Vorticity 6” focuses on supercell thunderstorms and their tornadoes. There’s billowing turbulent convection, undulating asperitas, bulging mammatus, microbursts, and more. There’s nothing like timelapse to highlight the growth, rotation, and shear involved in these storms. (Video and image credit: M. Olbinski)

    #asperitas #cloudFormation #clouds #convection #fluidDynamics #fluidsAsArt #mammatus #physics #science #thunderstorm #turbulence

  15. Cloud Convection on Titan

    Saturn’s moon Titan is a fascinating mirror to our own planet. It’s the only other planetary body with surface-level liquid lakes and seas, but instead of water, Titan’s are made of frigid ethane and methane. Like Earth, Titan has a weather cycle that includes evaporation, condensation, and rain. And now scientists have made their first observations of clouds convecting in Titan’s northern hemisphere.

    Using data from both the Keck Observatory and JWST, the team tracked clouds on Titan rising to higher altitudes, a critical step in the planet’s methane cycle. This translation took place over a period of days, giving scientists modeling the Saturnian moon new insight into the seasonal behaviors of Titan’s atmosphere. (Image credit: NASA/ESA/CSA/STScI; research credit: C. Nixon et al.; via Gizmodo)

    #atmosphericScience #clouds #convection #fluidDynamics #physics #planetaryScience #science #Titan

  16. I love a good roiling cumulus. 1 minute per second, approaching sunset yesterday. #timelapse #clouds #convection #Edinburgh

  17. Les cellules #orageuses de ce dimanche 27 avril ont révélé de somptueuses formes nuageuses, de l'arc en bordure d'averse aux mammatus!

    Merci pour vos jolies photos partagées dans les observations météo de l'App #MétéoSuisse
    #nuages #orages #convection #obsmeteo

    🐦🔗 twitter.com/meteosuisse/status
    🕐 27/04 19:52

  18. Les cellules #orageuses de ce dimanche 27 avril ont révélé de somptueuses formes nuageuses, de l'arc en bordure d'averse aux mammatus!

    Merci pour vos jolies photos partagées dans les observations météo de l'App #MétéoSuisse
    #nuages #orages #convection #obsmeteo

    🐦🔗 twitter.com/meteosuisse/status
    🕐 27/04 19:52

  19. Les cellules de ce dimanche 27 avril ont révélé de somptueuses formes nuageuses, de l'arc en bordure d'averse aux mammatus!

    Merci pour vos jolies photos partagées dans les observations météo de l'App

    🐦🔗 twitter.com/meteosuisse/status
    🕐 27/04 19:52

  20. Les cellules #orageuses de ce dimanche 27 avril ont révélé de somptueuses formes nuageuses, de l'arc en bordure d'averse aux mammatus!

    Merci pour vos jolies photos partagées dans les observations météo de l'App #MétéoSuisse
    #nuages #orages #convection #obsmeteo

    Original tweet: twitter.com/meteosuisse/status

  21. Les cellules #orageuses de ce dimanche 27 avril ont révélé de somptueuses formes nuageuses, de l'arc en bordure d'averse aux mammatus!

    Merci pour vos jolies photos partagées dans les observations météo de l'App #MétéoSuisse
    #nuages #orages #convection #obsmeteo

    Original tweet: twitter.com/meteosuisse/status

  22. Salt Fingers

    Any time a fluid under gravity has areas of differing density, it convects. We’re used to thinking of this in terms of temperature — “hot air rises” — but temperature isn’t the only source of convection. Differences in concentration — like salinity in water — cause convection, too. This video shows a special, more complex case: what happens when there are two sources of density gradient, each of which diffuses at a different rate.

    The classic example of this occurs in the ocean, where colder fresher water meets warmer, saltier water (and vice versa). Cold water tends to sink. So does saltier water. But since temperature and salinity move at different speeds, their competing convection takes on a shape that resembles dancing, finger-like plumes as seen here. (Video and image credit: M. Mohaghar et al.)

    #2024gofm #convection #doubleDiffusiveConvection #doubleDiffusiveInstability #flowVisualization #fluidDynamics #oceanography #physics #science

  23. Arctic Melt

    Temperatures in the Arctic are rising faster than elsewhere, triggering more and more melting. Photographer Scott Portelli captured a melting ice shelf protruding into the ocean in this aerial image. Across the top of the frozen landscape, streams and rivers cut through the ice, leading to waterfalls that flood the nearby ocean with freshwater. This meltwater will do more than raise ocean levels; it changes temperature and salinity in these regions, disrupting the convection that keeps our planet healthy. (Image credit: S. Portelli/OPOTY; via Colossal)

    #climateChange #convection #fluidDynamics #fluidsAsArt #geophysics #melting #physics #science

  24. Why Icy Giants Have Strange Magnetic Fields

    When Voyager 2 visited Uranus and Neptune, scientists were puzzled by the icy giants’ disorderly magnetic fields. Contrary to expectations, neither planet had a well-defined north and south magnetic pole, indicating that the planets’ thick, icy interiors must not convect the way Earth’s mantle does. Years later, other researchers suggested that the icy giants’ magnetic fields could come from a single thin, convecting layer in the planet, but how that would look remained unclear. Now a scientist thinks he has an answer.

    When simulating a mixture of water, methane, and ammonia under icy giant temperature and pressure conditions, he saw the chemicals split themselves into two layers — a water-hydrogen mix capable of convection and a hydrocarbon-rich, stagnant lower layer. Such phase separation, he argues, matches both the icy giants’ gravitational fields and their odd magnetic fields. To test whether the model holds up, we’ll need another spacecraft — one equipped with a Doppler imager — to visit Uranus and/or Neptune to measure the predicted layers firsthand. (Image credit: NASA; research credit: B. Militzer; via Physics World)

    #convection #fluidDynamics #Neptune #numericalSimulation #phaseSeparation #physics #planetaryScience #science #Uranus

  25. How Cooling Towers Work

    Power plants (and other industrial settings) often need to cool water to control plant temperatures. This usually requires cooling towers like the iconic curved towers seen at nuclear power plants. Towers like these use little to no moving parts — instead relying cleverly on heat transfer, buoyancy, and thermodynamics — to move and cool massive amounts of water. Grady breaks them down in terms of operation, structural engineering, and fluid/thermal dynamics in this Practical Engineering video. Grady’s videos are always great, but I especially love how this one tackles a highly visible piece of infrastructure from multiple engineering perspectives. (Video and image credit: Practical Engineering)

    #buoyancy #civilEngineering #convection #engineering #evaporation #fluidDynamics #heatTransfer #infrastructure #physics #science #thermodynamics

  26. 🔁 Christian C. (@CCChrispic)

    Magique #convection isolée persistante et parfois orageuse sur le #Gard en cette fin de journée. Les boitiers ont chauffé ! (timelapse). Un #avion décolle de @MPLaeroport au-dessus de l'étang de l'Or, la perspective est cotonneuse à souhait 🩶
    HQ : chrispics.fr/cieletnuages/ciel

    🐦🔗 twitter.com/CCChrispic/status/
    🕐 08/10 23:14

  27. @tao
    Let's say the umbral diameter is about 150km, then that's quite a large column of air being suddenly plunged into the cold of 'night'. The idea that a very tall 'convection tube' of falling air would form and draw in towards its centre the vapour trail from any passing plane I find not at all unbelievable.
    #eclipse #weather #convection

  28. [@IRAP #seminar] this Thursday at 11am. Andrea Chiavassa from the Lagrange Laboratory of the Observatoire de la Côte d'Azur will present his recent research work concerning 3D #modeling of stellar atmospheres - in particular the taking into account of the #convection phenomenon, which directly influences stellar parameters, radial velocity, chemical abundances, photometric colors and the characterization of #exoplanets.

    Details+ : irap.omp.eu/event/a-viewpoint-

  29. [#Séminaire @IRAP ] ce jeudi à 11h. Andrea Chiavassa du Laboratoire Lagrange de l'Observatoire de la Côte d'Azur présentera ses récents travaux de recherche concernant la #modélisation 3D des atmosphères stellaires - notamment la prise en compte du phénomène de #convection, qui influence directement les paramètres stellaires, la vitesse radiale, les abondances chimiques, les couleurs photométriques et la caractérisation des #exoplanètes.

    Infos+ : irap.omp.eu/event/a-viewpoint-