#2023gosmp

[fuckyeahfluiddynamics]

Polymers and Fluid Sheets

Even adding a small amount of polymers to a fluid can drastically change its behavior. Often polymer-doped fluids act more like soft solids, able to hold their shape like your toothpaste does when squeezed onto your toothpaste. (Video credit: C. Galvin et al.)

[fuckyeahfluiddynamics]

Drying Cracks

Droplets with particles in them can leave complex stains when they dry -- just look at coffee rings and whiskey marks! Here, researchers look at the patterns left on glass by small droplets that evaporated and left behind their nanoparticles. (Image credit: M. Ibrahim et al.)

[fuckyeahfluiddynamics]

To Clog or Not to Clog?

The clear plastic disks use to study clogging appear rather plain -- at least until you look at them through polarizers. Then the disks light up with a web of lines that reveal the unseen forces between the particles. (Video credit: B. McMillan et al.)

[fuckyeahfluiddynamics]

Mermaid Cereal

In the Cheerios effect, floating objects can fall into one another due to capillary attraction -- just like Cheerios link up in a cereal bowl. Here researchers play with that effect by adding repulsive magnets to their "cereal" pieces. (Video credit: A. Hooshanginejad et al.)

[fuckyeahfluiddynamics]

Long-Lived Bubbles

Without surfactants to stabilize them, bubbles don't last long at room temperature. But adding a little heat changes the picture. (Video credit: S. Nath et al.; see also)