Henry Kolesnik wrote:
This is a long and perhpas delerious shot but there may something called
thermal momentum a far reach but here goes. The hot water may be cooling at
a faster rate and forgets to wait on the cold water to catch up.

I've thought of this too, and it is very tempting - but taken by itself
it violates the law and concept of "flux is proportional to the
gradient," and so I have to ween myself off the impulse.

Bruce Jensen