Talk:Venturi effect

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I removed the reference to flutes, as the simple venturi effect isn't (to my knowledge) the main effect in a flute. If that offends anyone, please feel free to add it back in with more explanation. zowie 03:15, 22 September 2005 (UTC)

Contents

[edit] Merge Venturi and Venturi effect

I think these two articles should be merged because they are both relatively short and both try to discuss how the priciple and the device work. It should be easy to cover both in sub-sections of a single article if there is need to differentiate. -- Bovineone 02:19, 8 May 2006 (UTC)


I think they should be kept seperatre they are similar but different topics. I think they are fine the way they are

is there a reason why the article says "Trevor Quillin is a sleepy man. " under the practical uses section?

I believe these are the same effect - I vote Merge. Nimur 14:40, 3 June 2006 (UTC)

[edit] In in?

"The Venturi effect is visible in:" I don't know how to edit these things, but it says "visible in" and then the list items start with "in" again. So, e.g., it says "visible in in large cities..." when you read it through. Otherwise, it seems to be a very nice article, merged or not.

[edit] Aortic Regurge

What did you mean by "... visible in the capillaries of the human circulatory system, where it indicates aortic regurgitation"? Why does AR cause a Venturi effect in capillaries? Is flow not so slow in capillaries that any such effect would be tiny? j.k.baillie 23rd July 2006

[edit] An everyday example of the venturi effect mixing air and liquid.

In the Experimental apparatus, Venturi Tubes it says

A venturi can also be used to mix a fluid with air. If a pump forces the fluid through a tube connected to a system consisting of a venturi to increase the water speed (the diameter decreases), a short piece of tube with a small hole in it, and last a venturi that decreases speed (so the pipe gets wider again), air will be sucked in through the small hole because of changes in pressure. At the end of the system, a mixture of fluid and air will appear.

and the general description of the effect it says

The Venturi effect is a special case of Bernoulli's principle, in the case of fluid or air flow through a tube or pipe with a constriction in it.

It seems to indicate the converse could happen too...?

So if Air under pressure is forced through a venturi tube it will be able to suck a liquid in through a small hole producing aerated liquid.

eg The Venturi effect is used when a coffee machine uses steam under pressure to draw up and froth milk.

202.138.204.101 01:44, 1 December 2006 (UTC)


That is also how carburetors work. The Lightning Stalker 07:55, 11 December 2006 (UTC)

"A simple way to demonstrate the Venturi effect is to squeeze and release a flexible hose that is carrying water. If the flow is strong enough, the constriction will remain even if the hose would normally spring back to its normal shape: the partial vacuum produced in the constriction is sufficient to keep the hose collapsed."

Has anybody ever tried this -- it sounds pretty strange to me. 68.11.47.74 02:40, 30 March 2007 (UTC)


How is this Venturi effect demonstrated in "the effective burning of human waste waste"?

[edit] What?

This page only explains what the Venturi effect is through a number of terms that are impossible to understand for a layman. These terms are linked to, but requiring people to read about those as well makes it harder to understand what this is all about.

Could someone please add a simple explanation of what this is about, too? Something like

"In Physics, the Venturi Effect refers to a situation where materials in gaseous or fluid form take on a lower pressure than those in the surrounding area. This happens because (...technical explanation...)"

I'm not sure whether this is accurate (which is why I didn't add it myself), but it would be tremendously helpful.

Another good example of this is demonstrated when you blow across the top of a straw and the drop in pressure pulls some of the liquid up the straw.

Static ports on aircraft like a Cessna 182 are simply holes in the sides of the fuselage. Air flows across these holes at the same speed as the aircraft's air speed, yet the pressure at the static port is the same as ambient, regardless of the aircraft speed (within the range of a Cessna 182). I don't see how the straw situation is any different, unless you're not blowing directly perpendicular to the opening in the straw. Jeffareid (talk) 06:54, 17 March 2008 (UTC)
 —Preceding unsigned comment added by 192.122.250.250 (talk) 13:44, 4 October 2007 (UTC)

[edit] Um, air is a fluid.

"A venturi can also be used to mix a fluid with air." - Do you mean "mix a liquid with a gas"?

Air is a fluid. You can read about this on a website called "Wikipedia". —Preceding unsigned comment added by 99.231.124.188 (talk) 23:37, 23 February 2008 (UTC)

[edit] An item that should be added to practical uses

This is a tap water driven syphon for aquariums. Click on the link, then images, then go to page 3 to see diagram.

aquarium_syphon

It's not significantly different than the one patented in 1933. Click on image, and note figure 4.

washer_syphon

Is there a better name than syphon or siphon for these type of devices? I use the 1984 patented version for my aquarium, but recall an almost identical device I used to drain a basement back in the mid 1960's.

I've tried to find a diagram for one of these outside of patents, but I've had no luck in finding one. Jeffareid (talk) 01:40, 16 March 2008 (UTC)

[edit] Plumber asking for answers

HI I am a plumber, and also have some knowledge about hydraulics; now I am facing some issues with customers who complains about their water pressure, here in GA USA there is a regulation that mandates to install a PRV (pressure regulation valve) a very smart device that put a max in your static pressure but should allow the water flow without restriccion while its running, now I can not get in touch with nobody who can confirm me that, not even the tech support from one of the manufacturers can give me an answer with an explanation that supports his saying, because this device works based on the venturi effect I would like to receive some feed back from somebody who can answer me this question scientifically.Thanks.

  • What is your question? You have explained who you are, and the fact that you face some issues with your customers who complain about their water pressure, but what is their problem? There are no answers without there first being a question. 203.19.117.216 (talk) 22:56, 28 April 2008 (UTC)