The Kid Should See This

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 between the molecules of a fluid (be it liquid or gas). The Coanda effect is the culprit behind many everyday incidents as well as more esoteric phenomena, such has levitating a ball in a stream of air.

From the Harvard Natural Sciences Lecture Demonstrations channel on YouTube, Wolfgang Rueckner demonstrates the Coanda Effect using a wine bottle, a candle, coffee mugs, a hairdryer, a basketball, and more.

Next: How Ingenious Animals Have Engineered Air Conditioning and more Schlieren demonstrations, including What Does Sound Look Like?

🌈 Related videos

Speed up geologic time with a DIY squeeze box

Rion Nakaya

The Hammer-Feather Drop in the world’s biggest vacuum chamber

Rion Nakaya

Schlieren flow visualizations: What Does Sound Look Like?

Rion Nakaya

Electromagnetic Induction – Science Demo

Rion Nakaya

Make Lissajous patterns with DIY sand pendulums or light

Rion Nakaya

Build your own space-time warping demo for the classroom

Rion Nakaya

Rotating Saddle, a physics demonstration

Rion Nakaya

Why do spinning rings & spinning disks have different paths?

Rion Nakaya

Homemade marble track demonstrations by science teacher Bruce Yeany

Rion Nakaya

 
Browse the TKSST Video Collections

Get 7 smart videos delivered every week.

 

Subscribe