Topic: fluids

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Demonstrations of the Coanda Effect

Fluids flowing near a surface tend to follow the shape of the surface. Using Schlieren optics, we can see this behavior. It is known as the Coanda Effect and its explanation depends on viscosity, the frictional forces...

How Far Do Sneezes and Vomit Travel? – Gross Science

Let's enter the world of sneeze experiments and vomiting machines with Anna Rothschild as she explains just how far the tiny liquid particles from sneezes and vomit can travel... and it's farther than you think. 'Vomi...

Chemical Bouillon, a series of visually abstract chemical reactions

Hydrocarbon vs Ink - Implosion, above, from the Chemical Bouillon video series, "an artistic project studying the graphic aspect of chemical reactions" created by Antoine Delach, Valere Amirault, and Teurk in Paris, F...

Ferrofluid + Glow Sticks – The Physics Girl

Ferromagnetic + fluid = ferrofluid, a liquid containing nanoscale particles of magnetite, hematite, or an iron compound. Invented by NASA's Steve Papell in 1963, ferrofluid forms undulating spikes and patterns as it r...

An octopus that makes quicksand for a quick escape

The southern sand octopus can make a quick escape by making its own quicksand. How? It shoots jets of water into the sand grains, separating them into an almost fluid state, and allowing the octopus to burrow. There u...

A solid, liquid, & gas at the same time – The Triple Point

How can a chemical be a solid, a liquid, and a gas at the same time? In the video above, a clear liquid called cyclohexane is experiencing the perfect pressure and temperature combination for its solid, liquid, and ga...

“Analog experiments” that appear to defy gravity

If we could control gravity, or if we could defy it, this is what it might look like: pouring water upside down, balloons flying away sideways, and paint dripping in all directions! This is Gravity, a series of "analo...

Slime Cannon Attack – How Velvet Worm slime jets work

Giant velvet worms (Peripatus solorzanoi) are unusual creatures for many reasons -- including the fact that they are "not worms, not insects, millipedes, centipedes, or slugs" -- but their super-sliming glands, rapidl...

Stanford researchers solve the mystery of the dancing droplets

This beautifully-made video about a beautifully-colored series of experiments from a Stanford research team showcases how a observing a few droplets of food coloring -- made of water and propylene glycol -- have led t...

What makes that fresh rain smell? MIT films rain drops to find out

Why do we smell that fresh earthy scent before and/or after it rains? With high-speed cameras, MIT researchers have filmed rain drops, and believe that the footage explains petrichor, the "pleasant smell that frequent...

The Sticky Feet of Ants & Cockroaches – Cambridge Ideas

Have you ever watched an ant walk up a wall? Have you seen one upside down on a ledge while carrying something? How do insect feet stick like that?! Get a very close look at the minuscule foot anatomy of ants and cock...

The Hidden Complexities of the Simple Match – Science Take

Schlieren flow visualizations illuminate a world of activity that we almost never pay attention to, even when we're causing it to happen. Simple things like breathing, sneezing, clapping hands, or just producing heat ...

CYMATICS: Science + music = audio frequency visualizations

With help from a Chladni Plate, vibrating liquid on a speaker dish, a hose pipe optical trick, ferrofluid, a Ruben's Tube, and a Telsa Coil, New Zealand musician Nigel Stanford showcases audio frequency visualizations...

Non-Newtonian fluid bouncing in super slow motion (1600fps)

We've seen oobleck bouncing on a speaker before, but we've never see it in 1600fps super slow motion like this. Watch as The Slow Mo Guys color oobleck red, puddle it into an old speaker, and slow it way, way down. ...

A match being struck as seen with Schlieren technique

From RMIT University, watch a match being struck and lit, captured by a technique called Schlieren flow visualization. From FY! Fluid Dynamics: The schlieren optical technique is ideal for visualizing differences ...

The beautiful physics and math of sneezes

If you don't cover your mouth when you sneeze, that sneeze and the germs within it are explosively set free into the surrounding area. But where do the droplets travel and how far can they reach? No one had done much ...

Schlieren flow visualizations: What Does Sound Look Like?

What Does Sound Look Like? NPR’s SkunkBear shows us the differences in fluid densities — in the form of compression waves in a gas, the air that surrounds us — thanks to the light passi...

Why is ketchup so hard to pour?

That moment that ketchup transitions from a solid, high up in the ketchup bottle, to a liquid that squirts all over your fries – that moment is a big physics moment. Why? Ketchup is a non-Ne...

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