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View Full Version : How does fluid go down the drain where you live?



halfvolle melk
May 6th, 2006, 04:16 AM
After some testing I concluded that here the flow is like this:


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52°21′N 04°52′E

yabbadabbadont
May 6th, 2006, 04:24 AM
I'll just answer for everyone.

Counter-Clockwise in the Northern Hemisphere.

Clockwise in the Southern Hemisphere.

:P

Or did you just want everyone to say in which hemisphere they live?

briancurtin
May 6th, 2006, 04:35 AM
well i think we can close the books on this one

Jason_25
May 6th, 2006, 04:36 AM
I think I saw somewhere that this was an urban myth, and that the direction water spiraled as it drained wasn't affected by the geographical location.

halfvolle melk
May 6th, 2006, 04:49 AM
Exatly, Jason! So let's hear it yabbadabbadont and briancurtin, which way do your turds spin? We're building an emperical data base here!

woedend
May 6th, 2006, 04:51 AM
dude, you do know that toilets have water jets that determine the direction...doesnt really matter which way, itll go down. If you really want a test put pepper or something on water in a sink or bottle of still water, then drain it. Ill give you a hint though - hemisphere isn't going to affect it.

htinn
May 6th, 2006, 07:48 AM
The term you may be searching for is "Coriolis effect" (and it is a myth).

http://en.wikipedia.org/wiki/Coriolis_effect
http://www.snopes.com/science/coriolis.htm

professor_chaos
May 6th, 2006, 08:04 AM
The term you may be searching for is "Coriolis effect" (and it is a myth).

http://en.wikipedia.org/wiki/Coriolis_effect
http://www.snopes.com/science/coriolis.htm

Ohhh sure, and your gonna tell me next that the tooth fairy is not real!

I actually believed this myth, until you sir, ruined my blissful ignorance.
I'm going to have a difficult time sleeping tonight. :)

professor_chaos
May 6th, 2006, 08:06 AM
After further review.... Water in my drain goes



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jason.b.c
May 6th, 2006, 09:03 AM
which way do your turds spin?

Thats just plain nasty [-X , clockwise:-$

fuscia
May 6th, 2006, 10:03 AM
what does it do on the equator?

woedend
May 6th, 2006, 10:20 AM
evaporates before it can be drained.

Engnome
May 6th, 2006, 10:51 AM
Doesnt matter, how the water is flushed (enters) my toilet matters alot more than the corolis effect. However Ive read about someone who poured it in really big tanks and then he waited for a couple of days just to make sure the water wasnt moving. When he poured it out he could actually see the corolis effect.

Kimm
May 6th, 2006, 11:53 AM
The term you may be searching for is "Coriolis effect" (and it is a myth).

http://en.wikipedia.org/wiki/Coriolis_effect
http://www.snopes.com/science/coriolis.htm

The Coriolis effect is not a myth!

However, the flow of the water is strongly dependent on whether it was moving or not before you start flushing it.

We resently experimented with this and came to the conclution that (in the northern hemisphere) it rotates clockwise about 60% of the time, I'd also like to point out that this was tested using sinks and not toilets.

If you have a large container of water (still water), with a small hole at the bottom, the water will rotate clockwise in the northern hemsiphere

Edit:
Perhaps I should point out that these tests where conducted in the north of Sweden.

Engnome
May 6th, 2006, 01:19 PM
Exactly what I was trying to say, you were alot clearer though. Have you read http://www.faktoider.nu/ its great for checking those urban myths. Its mostly Swedish stuff though (some english). The rest of ya go watch mythbusters!

Biltong (Dee)
May 6th, 2006, 01:39 PM
Compared to the rotations that one usually sees (tires on a travelling automobile, a compact disc playing music, or a draining sink), the rotation of the Earth is very small: only one rotation per day. The water in a sink might make a rotation in a few seconds and so have a rotation rate ten thousand times higher than that of the Earth. It should not be surprising, therefore, to learn that the Coriolis force is orders of magnitude smaller than any of the forces involved in these everyday spinning things. The Coriolis force is so small, that it plays no role in determining the direction of rotation of a draining sink anymore than it does the direction of a spinning CD.
The full article is here: http://www.ems.psu.edu/~fraser/Bad/BadCoriolis.html

Kimm
May 6th, 2006, 02:34 PM
Biltong, ofcourse it does effect it!

Imagine you having a huge container of completely still water, then unplugg a small hole in the bottom... Something has to effect the direction the water runns, and what force is there to decide upon that? The Coriolis Effect!

And saying that the earth spinns slowly is simply not true.
The earth has about 40000 km around it, and it covers that in 1 day.

1 day = 24 hours
40000 / 24 ~ 1667 km/h
or for people that like it in m/s: ~ 493 meters/secund

Mind you, this is only at the equator.

Biltong (Dee)
May 6th, 2006, 03:24 PM
Woah, beware of scientific Swedes!!

Every time I have ever looked (which is not that often, believe me) my bathwater drains clockwise - and I put that down to me living in South Africa.

BUT, I knew that this article existed, and according to THEM the coriolis effect is negligible.

If you believe they are wrong, so be it.

- to have and voice ones opinion is what democracy is all about...

halfvolle melk
May 6th, 2006, 10:53 PM
My apologies. In the future I will refrain from atempting humor when it's way past my bedtime. Ofcourse corriolis will be the last effect you'll notice. But when I ever venture down south I'll try it anyway.

After further review.... Water in my drain goes

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lol, thanks for submitting your emperical findings!

ThirdWorld
May 6th, 2006, 11:03 PM
After some testing I concluded that here the flow is like this:


->
^ |
| v
<-

52°21′N 04°52′E


Dude, you should be very bored today... :D

fuscia
May 7th, 2006, 01:51 AM
i have just come from the equator where i had the oppurtunity to flush a toilet. upon flushing, the water flew straight up in the air, spread and fell like rain. there was even a rainbow.

Biltong (Dee)
May 7th, 2006, 02:07 AM
I wanted to see how fast the toilet water spun in Antartica but alas, the water froze before I could flush, so I had to take the toilet apart and bury the iced... erm...waste.
I blame Half-full-Milk for the labour involved and fully intend he pay me back for the areo-da-Antarctica plane ticket.
:-)

jason.b.c
May 7th, 2006, 05:15 AM
i have just come from the equator where i had the oppurtunity to flush a toilet. upon flushing, the water flew straight up in the air, spread and fell like rain. there was even a rainbow.


Oh really now?, Fell like rain "huh" ;) :---)