#JJJohnson #Viscosity #SaturdayMorningJazz #KUVO
Plucking Droplets
A sudden breeze can pluck droplets hanging from a stem. Here, researchers recreate that phenomenon in the laboratory. With a close-up view and high-speed images, we can enjoy every detail of the detachment and break-up. As the wire pulls away, it drags a liquid sheet off the droplet. The thicker rims on either side of the sheet eventually collide, creating a jet that stretches, deforms, and, at last, breaks. (Video and image credit: D. Maity et al.)
Animation of two droplets getting plucked, one made of glycerin+water (left) and one of water (right). #2025gofm #droplets #flowVisualization #fluidDynamics #physics #science #surfaceTension #viscosityUsing Navier-Stokes equations and simple experiments, Brown University physicists explored thin liquid films in the kitchen. Milk drains in ~30s, olive oil in 9+ min. Thin film physics everywhere!
🔗 https://phys.org/news/2026-03-liquid-kitchen-physicists.html
#FluidMechanics #ThinFilms #EverydayPhysics #Viscosity #KitchenScience

At some point, most people have found themselves holding a tilted carton of milk or bottle of cooking oil, patiently waiting for the last drops to drip out. Now, physicists at Brown University have done the math to show just how long you might have to wait.
SAE 20, 30, 40… think you know these numbers? Think again. Behind the labels lies steam-era labs, stopwatches, and a viscosity index myth. Time to see how engine physics crushes marketing tales. #MotorOil #Tribology #SAE #Viscosity #Engine #OilMyths

- Capillarity and viscosity: how liquids move -
Understand the relationship between capillarity and viscosity and their role in droplet dynamics with this video from the "Dynamics of fluid interfaces" MOOC by ESPCI Paris - PSL.
🎥 https://www.youtube.com/watch?v=Mq1EUe3cOCY&list=PLcbz7zf4dTyk9BqlBPLpgI48i9TiorpEi&index=13
The world is a viscous place.
- Capillary number: balancing viscosity and surface tension -
The capillary number quantifies how viscosity and surface tension interact in droplets. Explore this key concept in the ESPCI Paris - PSL MOOC video.
🎥 https://www.youtube.com/watch?v=bbEOcd977ec&list=PLcbz7zf4dTyk9BqlBPLpgI48i9TiorpEi&index=12
#CapillaryNumber #Viscosity #SurfaceTension #FluidPhysics #LeidenfrostEffect