Re: Tried oil on your Mac yet?

On Thu, 14 Feb 2008 15:12:18 -0600, Bill Rider wrote
(in article <M82tj.74483$k27.62105@xxxxxxxxxxxxxxxxxxxxxx>):

The New guy wrote:


Later they mentioned that it was just an experiment to see how long they
would run. They didn't make any difference to the temperatures.

The science majors here should be able to answer this: Heat rises in
air but does it rise in liquids the same way? I'm thinking yes when
reflecting on thermoclimes I've encountered when diving in the ocean.
But I wonder does heat rise in liquids (and do different liquids have
different heat rising parameters?) as rapidly as it rises in air? I was
wondering about hot spots in the mineral oil.


I'm no science major. The pressure causing convection would depend on
the density difference with respect to temperature. The amount of flow
the pressure would cause would depend on the viscosity and the amount of
space. The amount of heat in the flow would depend on the fluid's
specific heat and density and temperature difference.

Heat conduction varies with all materials. There are tables of this
that you can look up. Heat conduction from one end to another in a
metal rod is a common homework assignment in college calculus courses
for engineering majors.

Water looks like a better choice than mineral oil. The specific heat is
high and viscosity low. Besides, the thermal conductivity is four times
higher than mineral oil.

If a computer will run in mineral oil, won't it run in distilled water?
First I'd steam clean it!

Electrical conductivity is also an issue. ;-)



--
Randy Howard (2reply remove FOOBAR)
"The power of accurate observation is called cynicism by those
who have not got it." - George Bernard Shaw





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