#viscoelasticity — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #viscoelasticity, aggregated by home.social.
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💁🏻♀️ ICYMI: 🛠️📏 Duct tape stays secure on #spacecraft and peels away without leaving residue thanks to a property called #viscoelasticity.
EngineerGuy Bill Hammack explains how this material acts like a liquid and a solid to solve complex #engineering problems.
#activities #chemistry #cotton #design #experiment #inventions #physics #plastic #rubber #science #ww2 #tksst #video
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🛠️📏 Duct tape stays secure on #spacecraft and peels away without leaving residue thanks to a property called #viscoelasticity.
EngineerGuy Bill Hammack explains how this material acts like a liquid and a solid to solve complex #engineering problems.
#activities #chemistry #cotton #design #experiment #inventions #physics #plastic #rubber #science #ww2 #tksst #video
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Turbulence-Suppressing Polymers
Adding just a little polymer to a pipe flow speeds it up by reducing drag near the wall. But the effects on turbulence away from the wall have been harder to suss out. A new experiment shows that added polymers suppress eddy formation in the flow and reduce how much energy is lost to friction and, ultimately, heat. In particular, the researchers found that polymer stress helped stabilize shear layers in the flow and prevent them from destabilizing into more turbulent flow. (Image credit: S. Wilkinson; research credit: Y. Zhang et al.; via APS)
#dissipation #elasticTurbulence #fluidDynamics #instability #physics #polymerEffects #science #turbulence #viscoelasticity
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Turbulence-Suppressing Polymers
Adding just a little polymer to a pipe flow speeds it up by reducing drag near the wall. But the effects on turbulence away from the wall have been harder to suss out. A new experiment shows that added polymers suppress eddy formation in the flow and reduce how much energy is lost to friction and, ultimately, heat. In particular, the researchers found that polymer stress helped stabilize shear layers in the flow and prevent them from destabilizing into more turbulent flow. (Image credit: S. Wilkinson; research credit: Y. Zhang et al.; via APS)
#dissipation #elasticTurbulence #fluidDynamics #instability #physics #polymerEffects #science #turbulence #viscoelasticity
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Turbulence-Suppressing Polymers
Adding just a little polymer to a pipe flow speeds it up by reducing drag near the wall. But the effects on turbulence away from the wall have been harder to suss out. A new experiment shows that added polymers suppress eddy formation in the flow and reduce how much energy is lost to friction and, ultimately, heat. In particular, the researchers found that polymer stress helped stabilize shear layers in the flow and prevent them from destabilizing into more turbulent flow. (Image credit: S. Wilkinson; research credit: Y. Zhang et al.; via APS)
#dissipation #elasticTurbulence #fluidDynamics #instability #physics #polymerEffects #science #turbulence #viscoelasticity
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Turbulence-Suppressing Polymers
Adding just a little polymer to a pipe flow speeds it up by reducing drag near the wall. But the effects on turbulence away from the wall have been harder to suss out. A new experiment shows that added polymers suppress eddy formation in the flow and reduce how much energy is lost to friction and, ultimately, heat. In particular, the researchers found that polymer stress helped stabilize shear layers in the flow and prevent them from destabilizing into more turbulent flow. (Image credit: S. Wilkinson; research credit: Y. Zhang et al.; via APS)
#dissipation #elasticTurbulence #fluidDynamics #instability #physics #polymerEffects #science #turbulence #viscoelasticity
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Turbulence-Suppressing Polymers
Adding just a little polymer to a pipe flow speeds it up by reducing drag near the wall. But the effects on turbulence away from the wall have been harder to suss out. A new experiment shows that added polymers suppress eddy formation in the flow and reduce how much energy is lost to friction and, ultimately, heat. In particular, the researchers found that polymer stress helped stabilize shear layers in the flow and prevent them from destabilizing into more turbulent flow. (Image credit: S. Wilkinson; research credit: Y. Zhang et al.; via APS)
#dissipation #elasticTurbulence #fluidDynamics #instability #physics #polymerEffects #science #turbulence #viscoelasticity
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Watch Hagfish Slime Unfurl
The eel-like hagfish has one of the best defenses in the ocean. When threatened, it releases a slime that clogs the gills of its predator but allows the hagfish itself to slough off the slime and escape. The hagfish slime’s secret weapon is long protein threads, which are initially rolled into bundles called skeins. Seen above, these skeins resemble the yarn skeins knitters and crocheters buy, but a hagfish’s skeins are only as big as the width of a human hair.
When water flows by quickly enough, the thread in a skein begins to unwind and stretch out. With enough threads unwound, the slime gets stretchy and viscous. Researchers found that it takes relatively little flow to begin this unwinding because the adhesion between threads and the surrounding fluid is higher than the thread-to-thread sticking power. (Research and image credit: M. Hossain et al., video)
#biology #fluidDynamics #hagfish #physics #rheology #science #viscoelasticity
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Tides Widen Ice Cracks
When icebergs calve off of Arctic and Antarctic coastlines, it affects glacial flows upstream as well as local mixing between fresh- and seawater. A recent study points to ocean tides as a major factor in widening the ice cracks that lead to calving. The team built a simplified mathematical model of an ice shelf, taking into account the ice’s viscoelasticity, local tides, and winds. Then they compared the model’s predictions with satellite, GPS, and radar data of Antarctica’s Brunt Ice Shelf, where an iceberg the size of Greater London broke off in 2023.
Between their model and the observation data, the team was able to show that the crack that preceded calving consistently grew during the spring tides, when tidal forces were at their strongest. The work gives us one more clue for refining our predictions of when major calving events are likely. (Image and research credit: O. Marsh et al.; via Gizmodo)
#calving #fluidDynamics #iceShelf #iceberg #oceanTides #physics #science #viscoelasticity
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“Droplet on a Plucked Wire”
What happens to a droplet hanging on a wire when the wire gets plucked? That’s the fundamental question behind this video, which shows the effects of wire speed, viscosity, and viscoelasticity on a drop’s detachment. With lovely high-speed video and close-up views, you get to appreciate even subtle differences between each drop. Capillary waves, viscoelastic waves, and Plateau-Rayleigh instabilities abound! (Video and image credit: D. Maity et al.)
#2024gofm #droplets #fluidDynamics #physics #science #viscoelasticity #viscousFlow