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Author Topic: Wave like water on the road.  (Read 3625 times)

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?


 

Offline DoctorBeaver

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

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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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
 

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

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
 

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Wave like water on the road.
« Reply #6 on: 29/02/2008 23:10:32 »

 

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