L'effet Venturi -Venturi effect

L'effet Venturi : un soufflant et une balle de ping-pong sont utilisés pour montrer l'effet de portance et l'effet d'aspiration de Venturi- A blowing and a table tennis ball are used to show the effect of bearing pressure and effect of Venturi.

Category:

Howto & Style

Tags:

• sciences
• Venturi
• portance
• air
• pressure
• pression
• fluid
• dynamique-des-fluides
• fluid-dynamic

[corght]

It's all about air pressures

Venturi effect: The enlargment of the funnel reduces the pressure of air so the atmospheric pressure is greater than the fan's and it pushes against the ping pong

ball and against gravity.

Bernoulli's principle: When air travels faster, its pressure lowers then the atmospheric pressure pushes on the the two sheets.

[ViveMozart02]

ouaw! c'est trop fort!! et malgré le fais que j'ai vue ces images j'arrive pas a comprendre comment la balle reste coller au font de l'entonnoir!

[michaelovitch]

@corght i checked several times to be sure.

really.

[corght]

@michaelovitch

If the air pressure was greater, the ball would fly off the funnel, not stay in it. Learn some physics before commenting.

[michaelovitch]

@corght

wrong.

the enlargment of the funnel raise the air pressure but lower it's speed.

[YLG80]

@vraie19 Vous pouvez utiliser toute soufflerie du moment qu'elle soit assez puissante par rapport à la masse de al balle. Un sèche cheveux p.ex ... à froid évidement.

[TheNeble100]

a quoi sert l'entonoir

[KhanSlayer]

who's the artist in the music?

[kaprinido]

ekzistas simila ileto por la Koanda efiko : Lorenzo

[imslashjr]

At the Maine Discovery Museum in Bangor, Maine there is a hands-on demonstration of this. The funnel is not used only 3 separate hoses. It is one of the most used demonstration. Without the funnel I would not expect to be able to invert the hose.

[georgH]

Sorry, I mistakenly marked corght's comment as spam.