Wave like water on the road.

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paul.fr

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Wave like water on the road.
« on: 25/02/2008 07:17:31 »
After the rain has stopped, i sometimes notice the water moving down the road is 'wave like'. IE, it moves in waves, just like at the beach. Why is that?

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Offline DoctorBeaver

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Wave like water on the road.
« Reply #1 on: 25/02/2008 07:59:37 »
Wind.
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lyner

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Wave like water on the road.
« Reply #2 on: 25/02/2008 09:19:07 »
I think it could also be because a thin layer moves slower than a thick layer of water over a rough surface. A randomly thicker region will soon catch up the slower bits and gather water with it, traveling faster in a runaway effect. It will leave behind a slower moving shallow bit.
Irregularities in the road surface can start turbulence which can set up a standing wave, too; there's a transition between laminar and turbulent flow.

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Offline DoctorBeaver

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Wave like water on the road.
« Reply #3 on: 25/02/2008 15:26:28 »
Sorry, I didn't make myself clear. I wasn't offering that as an answer, it's what I suffer from  [:D]
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lyner

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Wave like water on the road.
« Reply #4 on: 25/02/2008 18:28:21 »
Poor chap.

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Offline DoctorBeaver

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Wave like water on the road.
« Reply #5 on: 26/02/2008 07:46:17 »
Indeed
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Offline Soul Surfer

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Wave like water on the road.
« Reply #6 on: 29/02/2008 23:10:32 »
I agree sophie and find the whole process of water moving over surfaces fascinating.  I feel that there may well be important things to learn here about the way things like the expansion of the universe started out
Learn, create, test and tell
evolution rules in all things
God says so!