Whart is the formula to find out if a 15" roll(inside diameter) with 2" of water at the bottom is rimming? Speeds are up to 400m/min (outside diameter19") it is a metal roll.
Does rimming imply that the water is being carried centrifugally around
on the inside of the roll where an open ended 15" diameter roll is
immersed to 2" in a water bath? If so, I would suspect that the
rimming is indeed occurring, but I would suggest you would need to
consult someone at university that deals with transport phenomena
calculations.
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The "rimming" is when the water is spread out in an even layer across the inside of the drum by rotation. The waterlevel is the maximum layer of water in the bottom of the roll when the roll is not moving.
There must be some kind of formula that can get to an approximate speed.
Sorry if my english is not perfect. I'm still learning.
There is a mathematical way of doing it though it looks like being quite involved.
The surface of the water will form a paraboloid inside the vessel, unless the bottom of the vessel becomes exposed; one needs to do the calculation to see if the water is touching the rim at this point, for which the height of the vessel, missing from the post, is required.
It might be simpler, given that the speed is variable, to try it and see.
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Roll rimming
Re: Roll rimming
