Re: [compost_tea] Re: Pumping air in is not the best way to aerate your tea

From: Lloyd Charles (lcharles@webfront.net.au)
Date: Sat Feb 22 2003 - 18:27:48 EST



Subject: Re: [compost_tea] Re: Pumping air in is not the best way to aerate
your tea


> I failed to respond last year when this was first posted, but I will
> now. I do not see how 90 degree bends in a fluid transfer systems would
> kill life. You have to look at the velocity profile of water moving in
> a pipe to realize that irregardless of the direction or route, you are
> going to have laminar flow. The greatest velocity would of course be in
> the center of the pipe, while do to the co-efficient of friction between
> the fluid and the pipe, the smallest velocity would be in the "boundary
> layer" next to the pipe wall. This boundary layer, to my way of
> thinking, would be the most destructive to the living organisms in the
> CT, due to friction. This would hold true in a 90, 45, or even a
> straight pipe. The fluid just doesn't shoot through the pipe and go
> splat on the wall of a corrosponding elbow.
> Bill Baranick

Thank you Bill for a proper scientific perspective on this
Lloy Charles




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