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Author Topic: What Causes A Whirlpool Like This ?  (Read 13603 times)

Offline neilep

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What Causes A Whirlpool Like This ?
« on: 29/08/2007 00:56:24 »
I've always looked upon whirlpools in the ocean with a sense of foreboding,




what causes them ?....does the funnel go very deep ?





 

Offline DoctorBeaver

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What Causes A Whirlpool Like This ?
« Reply #1 on: 29/08/2007 06:38:07 »
UUOs (Unideditied Underwater Objects)
http://www.rense.com/general10/san.htm
 

Offline ukmicky

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What Causes A Whirlpool Like This ?
« Reply #2 on: 29/08/2007 18:00:32 »
Strong currents such as those caused by tides at river mouths, and i agree they are scary even though most dont contain much of a vortex.
 

Offline neilep

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What Causes A Whirlpool Like This ?
« Reply #3 on: 29/08/2007 23:05:05 »
UUOs (Unideditied Underwater Objects)
http://www.rense.com/general10/san.htm

First it was crop circles and now ET wants to make whirlpools....!!


..What is it with ET and roundy stuff !!
 

Offline iko

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What Causes A Whirlpool Like This ?
« Reply #4 on: 29/08/2007 23:11:35 »
 

Offline neilep

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What Causes A Whirlpool Like This ?
« Reply #5 on: 29/08/2007 23:14:24 »
Hi IKO.....

Oh MY !!!......I think I saw one just like it in my bath last February!!
 

Offline JimBob

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What Causes A Whirlpool Like This ?
« Reply #6 on: 30/08/2007 03:44:30 »
Having et the small worm, above, for a midnight snack, I can add that whirlpools like this are also found where water from two different directions flow through a relatively narrow space between land masses. (Straits between Italy and Sicily) They can also be formed where two raging rivers join. Whirlpools are the result of turbulent flow that has reached a very high state of turbulence.

Neil, you should change your bathwater more often. It would keep it from being so murky that you can't see what is in it. But then considering how often you take a bath, the water has cleared and all silt has settled to the bottom, so why change it?.
 

Offline iko

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« Last Edit: 30/08/2007 17:45:19 by iko »
 

Offline peopleunit

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What Causes A Whirlpool Like This ?
« Reply #8 on: 04/09/2007 01:57:27 »
Years ago I went on a canoe trip down the Upper Iowa river. At one point, the river had narrowed quite a bit and we were going through a place with high limestone cliffs on both sides when all of a sudden the river took a sharp 90 degree turn to the left. Right in the middle of the turn was a VERY active whirlpool!

The river was probably about 15 feet wide at that point, and the whirlpool's vortex was about 10 feet in diameter (about the same as the length of our canoe) with a depth of 2-3 feet.

Thinking fast, we picked up our speed as we approached it and used the outer edge of the vortex as a banked curve.

Had we gone straight through the middle, I don't if we'd have made it through. Its quit possible we'd have capsized if the front end of the canoe had dipped into the depression and got caught up in the swirl. It was fun being able to skirt our way through it like we did, but it was also scary, and probably quite dangerous.

You can chalk that one up as a definite rush! :-)
 

Offline JimBob

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What Causes A Whirlpool Like This ?
« Reply #9 on: 04/09/2007 23:41:57 »
Technically - it is a difference between laminar flow (actually relatively laminar flow) and turbulent flow. Turbulence causes eddys and this is the start of a whirlpool. The higher the turbulence, the greater the whirlpool-eddy. Laminar flow means smooth water. This is why the 90 degree turn in an otherwise relatively safe river had a whirlpool.
 
 

Offline neilep

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What Causes A Whirlpool Like This ?
« Reply #10 on: 06/09/2007 20:11:58 »
Years ago I went on a canoe trip down the Upper Iowa river. At one point, the river had narrowed quite a bit and we were going through a place with high limestone cliffs on both sides when all of a sudden the river took a sharp 90 degree turn to the left. Right in the middle of the turn was a VERY active whirlpool!

The river was probably about 15 feet wide at that point, and the whirlpool's vortex was about 10 feet in diameter (about the same as the length of our canoe) with a depth of 2-3 feet.

Thinking fast, we picked up our speed as we approached it and used the outer edge of the vortex as a banked curve.

Had we gone straight through the middle, I don't if we'd have made it through. Its quit possible we'd have capsized if the front end of the canoe had dipped into the depression and got caught up in the swirl. It was fun being able to skirt our way through it like we did, but it was also scary, and probably quite dangerous.

You can chalk that one up as a definite rush! :-)

Hi Peopleunit,

Thanks for your exciting recollection !

I bet that got the adrenalin flowing.

Welcome to the site !!
 

Offline peopleunit

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What Causes A Whirlpool Like This ?
« Reply #11 on: 07/09/2007 03:26:26 »
Welcome to the site !!

Thanks for the welcome Neilep, these forums are like candy to an information junkie! :-)
 

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What Causes A Whirlpool Like This ?
« Reply #11 on: 07/09/2007 03:26:26 »

 

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