Physics lesson
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Old 1 Week Ago   #1
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Default Physics lesson

Water spilling over the clear structure at first sheets down the side in laminar flow. Then, as gravity increases the kinetic energy of the water, it moves faster, and becomes more efficiently moved by turbulent flow.



Cool.


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Old 1 Week Ago   #2
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Default Re: Physics lesson

That is pretty cool. Never thought about it and now I'm wondering about it.
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Old 1 Week Ago   #3
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Default Re: Physics lesson

Some turbulence at the bottom, but I don't think the water film is thick enough for full-on turbulent flow.
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Old 1 Week Ago   #4
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Would the "characteristic length" be the thickness of the water, or the width of the water? Seems to me that a 0.5 cm flow 1 cm wide would be laminar at speeds we see here, but clearly the flow over the width of that surface is not laminar.
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Old 1 Week Ago   #5
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Well, not entirely laminar, anyway. As a physics major, I never had that much practice on computing Reynold's numbers for water films such as this one. This would be more the baliwick of a mechanical engineer.


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