Fifteen years ago, researchers used high speed video to show that when a drop of water coalesces into a layer of the same liquid, it does so not instantaneously but in a matryoshka-like cascade, with each step generating a smaller drop. Now, a newly published study finds that soap bubbles do something similar. »
Here’s a cool aspect of fluid dynamics that you might not have thought of before: When a shape is pushed into the water, it creates a space in its wake. As the space collapses, the shape inverts itself. »
Watch a bubble annihilate itself by stabbing itself, splitting in two, and then dissolving into two tiny clouds of bubbles. It’s quick, it’s beautiful, and, with the accompanying explanation, it’s weirdly intuitive. »
This experiment involves two liquids and a machine that will jiggle them. That’s all. So how does it create a family of “worms” that branch out from and interact with each other? Check out this incredible video. »
My thoughts, in order, upon viewing this drone footage of a “giant intake vortex” in an Oklahoma waterway: Hey, cool, a vortex! Wow, it is, indeed, giant looking. Big enough to swallow a person, surely. What would that be like? Dreadful, I bet. Wait, why am I sweating? Oh god. Oh god, it’s looking at me. »
This is so cool! Here’s a video that shows an ink drop getting hit, all of a sudden, by a laser. We can see what happens when the laser pulse is out of focus, and the drop is pushed. And we can see the drop get obliterated when it’s hit with a focused laser.
Worthington jets are the reason we must live in fear of splashback during all our water-related activities. A small object hitting the water can create a jet of water that shoots up. Here you can see it happening from both below and above the water. »
A quick tap on the top of a freshly-opened beer brings up a massive wave of fizz. This video lets you see how that happens, and tells you what’s happening inside the bottle.
Weird stuff happens when water hits hydrophobic substances. In this case, water and hydrophobic sand turn into a “liquid marble” in this video. It’s like watching the T-1000 get mobbed by fire ants. »
When denser river water flows into the ocean, it creeps along the bottom churning up sediments to create a turbidity current. For the first time, researchers caught a flood-triggered hyperpycnal flow in a murky, cloudy mess surging into the Gulf of Aqaba on video. »
This video is just water splashing on a hydrophobic surface in slow motion. That doesn't sound like much, until you see the first fifteen seconds, in which a water droplet smashes to pieces and comes together again like the liquid-metal Terminator.
Researchers at the MIT Department of engineering wanted to study the best ways to burrow through granular material. And in order to study the phenomenon, they looked at snakes, lizards, roundworms, and clams — and made some amazing videos, that it's hard to look away from. »
This slow motion video explains an phenomenon called "buckling instability" - the crimped edges of a splash of water. More importantly, it shows us how much familiar physics we don't notice until it's pointed out to us. »
What happens when your production budget consists of water, soap, food colouring, and maybe a bit of magnetic goo? If you're the filmmaker responsible for this music video, the result is a beautiful demonstration of fluid dynamics, fingering flows, drips, and bubbles. »
The Slow Mo Guys squirted various colors of ink into a big tank of water and shot it on white seamless with a phantom 4K camera. The resulting footage, played back in suuuuuper slllllowwww moooootion, is utterly entrancing. »
When a crowd needs to pass through a small doorway – an emergency exit, for example – the opening can quickly become obstructed. Recently, researchers have been using sheep to understand how they might mitigate this potentially catastrophic bottleneck effect. »
Climate change is bad. Melting glaciers are also bad. However, both these things lead to something called "dead water." From a nautical perspective, this is also bad because it stops a ship in the middle of the ocean. But it is so, so cool to look at. »
How many licks does it take to get to the center of a Tootsie Pop? According to Jinzi Huang, co-author of a recently published study that examines how "hard candy bodies dissolve in laminar high-speed water flows," approximately 2,500. »