The Mystery of the Tap

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#1 AdamSpeight2008  Icon User is offline

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The Mystery of the Tap

Posted 19 April 2011 - 04:53 PM

When you first open a tap, the water slowly comes out.
The more you open the tap the faster the flow of water.

But when you put your thumb over the tap to restrict the flow.
The smaller the gap the faster flow of water speeds out.

So shouldn't the opening of the tap be the same as your thumb, its just same you have water flowing into the tap under pressure.


Why doesn't it?
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#2 Creecher  Icon User is offline

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Re: The Mystery of the Tap

Posted 19 April 2011 - 04:57 PM

See http://en.wikipedia.org/wiki/Water_tap under "Tap Flow" and "Tap Mechanisms"
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#3 AdamSpeight2008  Icon User is offline

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Re: The Mystery of the Tap

Posted 19 April 2011 - 05:49 PM

Which part tells explains why?
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#4 Creecher  Icon User is offline

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Re: The Mystery of the Tap

Posted 19 April 2011 - 06:17 PM

View PostAdamSpeight2008, on 19 April 2011 - 07:49 PM, said:

Which part tells explains why?

I assumed you would've read the Choked Flow section that it was linked to.

http://en.wikipedia....iki/Choked_flow


Quote

In the case of upstream air pressure at ambient atmospheric pressure and vacuum conditions down stream of an orifice, both the air velocity and the mass flow rate becomes choked or limited when sonic velocity is reached through the orifice.

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#5 D.Mulroy  Icon User is offline

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Re: The Mystery of the Tap

Posted 19 April 2011 - 06:33 PM

English please? haha wiki links/quotes only go so far.
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#6 ishkabible  Icon User is offline

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Re: The Mystery of the Tap

Posted 19 April 2011 - 06:33 PM

i think the mechanism that controls the flow allows extra water to go around so that the pressure doesn't build up. your thumb on the other hand dose allow pressure to build up. that's just my guess anyways.

This post has been edited by ishkabible: 19 April 2011 - 06:34 PM

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#7 AdamSpeight2008  Icon User is offline

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Re: The Mystery of the Tap

Posted 19 April 2011 - 06:38 PM

How is chocking the flow different to restricting the flow?
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#8 hookiethe1  Icon User is offline

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Re: The Mystery of the Tap

Posted 19 April 2011 - 08:11 PM

The difference is that when you put your thumb over it, it's the end of the line. The same thing happens inside the tap, but that little spray of water has to fill the rest of the line to the end, so it comes out as a trickle. If you could see inside the tap you would see the water spraying out from under the washer hard, but then it has to fill the chamber and by the time it gets to the nozzle all the pressure is gone.

Hope that makes sense, it's one of those intuitive things that's kinda hard to explain. I would rough up a pic for you if it wasn't bedtime.
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#9 NeoTifa  Icon User is offline

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Re: The Mystery of the Tap

Posted 20 April 2011 - 05:20 AM

It's sorta the same thing that makes airplanes fly: pressure.
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#10 lordofduct  Icon User is offline

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Re: The Mystery of the Tap

Posted 20 April 2011 - 06:34 AM

go to your tap, unscrew the bit on the end, remove all the screens, and pull down the plastic choke in there some.

Now turn on your faucet.

SPURSH



anyone whose lived in the ghetto knows this.
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#11 Craig328  Icon User is offline

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Re: The Mystery of the Tap

Posted 20 April 2011 - 07:52 AM

Ghetto Plumbing?
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#12 lordofduct  Icon User is offline

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Re: The Mystery of the Tap

Posted 20 April 2011 - 07:55 AM

Ghetto plumbing:

Dismantled for parts to create drug paraphernalia, beat your partner, or sell for rent money. Then reconstructed to perform originally intended job at half measure.

This post has been edited by lordofduct: 20 April 2011 - 07:56 AM

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#13 Craig328  Icon User is offline

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Re: The Mystery of the Tap

Posted 20 April 2011 - 07:56 AM

Oh.

Once again, I learned something on D.I.C.
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#14 lordofduct  Icon User is offline

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Re: The Mystery of the Tap

Posted 20 April 2011 - 08:00 AM

o_O

You've never heard anyone say something like:

"When I'm out of here I'm taking the copper with me."

or

"Just grab a screen out of the bathroom sink... wait, that ones empty try the kitchen."

or seen a baser construct and smoke a rock out of a p-trap? I swear they must have been heart broken when their plumbing was finally updated and found out that sink plumbing is now plastic...

This post has been edited by lordofduct: 20 April 2011 - 08:03 AM

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#15 Craig328  Icon User is offline

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Re: The Mystery of the Tap

Posted 20 April 2011 - 08:02 AM

Nope.
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