#splashing — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #splashing, aggregated by home.social.
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Crown Splash
When a falling drop hits a thin layer of water, the impact sends up a thin, crown-shaped splash. This research poster shows a numerical simulation of such a splash in the throes of various instabilities. The crown’s thick edges are undergoing a Rayleigh-Plateau instability, breaking into droplets much the way a dripping faucet does. On the far side, the crown has rapidly expanding holes that pull back and collide. The still-intact liquid sheet at the base of the crown shows some waviness, as well, hinting at a growing instability there. (Image credit: L. Kahouadji et al.)
#2024gofm #CFD #computationFluidDynamics #crownSplash #fluidDynamics #instability #physics #PlateauRayleighInstability #science #splashing
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Charged Drops Don’t Splash
When a droplet falls on a surface, it spreads itself horizontally into a thin lamella. Sometimes — depending on factors like viscosity, impact speed, and air pressure — that drop splashes, breaking up along its edge into myriad smaller droplets. But a new study finds that a small electrical charge is enough to suppress a drop’s splash, as seen below.
The drop’s electrical charge builds up along the drop’s surface, providing an attraction that acts somewhat like surface tension. As a result, charged drops don’t lift off the surface as much and they spread less overall; both factors inhibit splashing.* The effect could increase our control of droplets in ink jet printing, allowing for higher resolution printing. (Image and research credit: F. Yu et al.; via APS News)
*Note that this only works for non-conductive surfaces. If the surface is electrically conductive, the charge simply dissipates, allowing the splash to occur as normal.
#dropletImpact #droplets #electricalField #electrohydrodynamics #fluidDynamics #lamella #physics #science #splashes #splashing
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Baltimore Oriole (Icterus galbula) in Norman, Oklahoma, United States on August 29, 2024
Some of the camera settings I used to make this photo are at: https://www.rsok.com/~jrm/2024Sep30_birds_and_cats/2024aug29_oriole_IMG_1418c.html
#oriole #BaltimoreOriole #birds #Icterus #wildlife #playing #Oklahoma #wildlifephotography #splashing
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So in honor of the US heat wave here's a #happy photo of kids and some adults #splashing around the wading pool at #BostonCommons July 2018
We had a very nice day wandering around the commons and the surrounding neighborhood.