Some is better than none.
I could get long winded (like I do far too often) and talk about fluid dynamics and rotational momentum and blade shear...
None of that would do you much good. The real answer is WATCH THE TANK. A little vortex is good. You want just enough swirl that whatever is floating on the top gets pulled down in after a while.
If you have too much vortex (and not enough baffle) the slurry will tend to fly out toward the sides of the tank and maybe even try to overflow the sides of the tank.
Long story short... TRY different sizes until you find the size that works the best in your mixer for the thickness of the mix you want to use. This need not be rocket science.
You might be able to figure out a way to simply strap or clamp a few test baffles so you can figure out what size makes sense. Then install it more securely once you choose the best one.
--- In papercreters@yahoogroups.com, Ron Richter <ronerichter@...> wrote:
>
> Thanks Slurryguy,
> I was working in isolation here in Montana when I built the tow mixer. I watched the DVD Charmaine sells with Gordon Solberg but that was about it. I didn't know about this group then.
>
> I do have a baffle but it is only1.5" angle iron. I have only one. Should it be bigger and should I add one or two?
> Thanks
>
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