> > >
> >Correct, RayO, 'wind chill' is specific to the perception of cold by the > >human body.
>
> Not just limited to humans. A fan directed at perfectly dry hot
> machine or circuitry is a perfect example of "wind chill." The
> machine is most certainly being cooled (chilled if you will) by the
> moving air from the fan (wind if you will).
So, if you blow 50° air over a machine, the lowest temp it will experience is 50°, right? If the machine is colder than
50° then the blowing air will actually be warmer than the machine, therefor warming the machine up to 50°.However, humans have something that machines don't: Perspiration. When you blow 50° air over skin with sweat glands, skin that is normally moist to some extent, not only will the skin chill down to 50°, due to evaporative cooling it will actually cool to temperatures below 50°. The faster the wind, the more the evaporation, the further below 50° the skin temperature can go.
This, in a nutshell, is wind chill. What you believe to be "wind chill" isn't. When inanimate objects achieve perspiration then you will be right, like a broken clock is right twice a day. :)
JazzMan