On Mon, 27 Jul 2009 11:25:38 -0700 (PDT), KD7HB
wrote:

On Jul 27, 10:14*am, Ned Simmons wrote:
On Mon, 27 Jul 2009 10:03:46 -0700 (PDT), KD7HB
wrote:

One interesting thing I discovered long
ago is that the faster the water flows through a system, the less heat
transfer that occurs.

So maximum cooling occurs at zero flow? g

--
Ned Simmons

No, maximum heat transfer occurs.

I can imagine there may be specific regimes where increasing flow
reduces heat transfer, but I don't believe that it's true in general.

You then have to get that hot water
out to cool it and recycle it back to the engine. Look at the top/
bottom of a radiator. Many small, restricted openings to the cooling
tubes.

Been too long since the college physics class.

It's been 35+ years for me since I dealt with Messrs. Reynolds,
Prandtl and Nusselt, and 34 years since I forgot it all.

--
Ned Simmons