AHHHHHH!  Fluid dynamics!  Run away!  Run away!

I suspect you will have some difficulty finding simple equations to
describe this.  Scientists are interested in much more rigorous
models, and fountain designers would rather set up a set of
experiments and gather empirical data.

I've always wanted to make a laminar flow fountain.  It looks like a
glass rod in a parabola:
http://www.wetdesign.com/elements/laminar/index.html
http://www.wetdesign.com has a bunch of other interesting ideas for
fountains and fountain heads.  They have a lot of patents as well, so
it's worthwhile looking through those.  Chances are if you call them
with your question they may give you some help.  The patent has
expired, patent number  4,795,092.  It may be that the later patents
on control machanisms have also run out.

It's going to be awhile before I move that project off the back burner...

-Adam


On 2/28/06, Mike Hord <mike.hord@gmail.com> wrote:
> I'd like to make some fountains for my home, and I'm wondering
> if anyone has any input.
>
> In particular, I'm wondering about an equation describing the
> behavior of a stream of water emerging from a hole in a
> reservoir.  Google search terms are proving elusive.  It seems to
> me that the equation should be pretty simple, based on depth
> of water and size of hole.  The result should be a half-parabola.
>
> Anyone have any ideas?
>
> Mike H.
>
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