"Doug Miller" wrote in message
...
In article , "JR Weiss"
wrote:
"Doug Miller" wrote:

You're apparently thinking of convection, which does indeed transport
heat
only upward.

Not quite...

NATURAL convection will tend to transport heat upward..

Merely "tend to" ??? Seems you misspelled "always". :-)

FORCED convection,

No such thing. If it's fan-forced, it's not convection.

as in a forced air furnace, can transport heat in any direction it is
directed by fans, ducts, etc. Wind tends to transport heat sideways in
the
local case...

Wind isn't convection either.

So a convection oven does not use convection? Of course it does.

Convection is transport of heat by motion of a fluid. There can be
mechanical convection, or there can be convection driven by gravity acting
on density differences in the fluid.


--
Jeremy S. Nichols, PE
Minneapolis, MN