The Coanda Effect

A simple experiment using (i) running water from a tap, and (ii) air blown through a straw, as it flows over the back of a vertically hanging plastic teaspoon are used to demonstrate the Coanda effect. Here the attachment of the back of the teaspoon to the flowing stream of fluid (air or water in this case) is what is referred to as the Coanda effect.

Category:

Howto & Style

Tags:

• Coanda
• effect
• physics
• deomonstration
• experiment
• tap
• running
• water

[lawrenceworkgrave]

@Acer81996 I just read the Wiki article about Coanda effect: "A common misconception is that Coandă effect is demonstrated when a stream of tap water flows over the back of a spoon held lightly in the stream and the spoon is pulled into the stream.[...] This particular demonstration is dominated by surface tension."

[pcdsgh]

when Henri Coandă created the first jet powered airplane, he saw how the flames attatched to the wooden body of the plane. it's essential to take this effect into consideration when building aircraft (+, the effect is used by airplanes' wings). that's why it's called the Coandă effect.

[rubisco71]

Not the Coandă effect. This is caused by surface tension.

[michaeljoefox]

Not coanda.

[redpunk]

@WaroWari it's not attracted to the water. it's being held by surface tension

[jarkanciofan]

Is the same thing with air. :D

[WaroWari]

@666spicytaco

even though the water pushes against the spoon, the spoon is still attracted to the water. its used in plane wings so when the air goes over the wings, the air stays attached, so that another effect of planes can come into effect

[lightbodyification]

Awesome vid, explains such simple effects of Coanda.

[666spicytaco]

im confused wat does this prove exactly...? :(

[slateflash]

in your materials list u forgot : lotsa water

[zker666]

i thought this was Bernoulli's principal?

[Aranx2o]

Lol his sink got all wet after the POWER POUR!