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02 January 2018

Re: [DIY] wind chill

 

Ahhh....I am also a Graduate Engineer...and his answer is WAY out of line
for wind chill as defined by skin temp...he is discussing an over the edge
thermodynamic phenom entirely UNRELATED to wind chill.. An apple is
an apple if you observe at it from the left or look at it from the right..but it never
looks like a pear or banana...wind chill is restricted to living beings.

Period.

Inanimate objects do not experience wind chill as discussed in the article I posted.

Thermo transfers are not wind chill per se but a system of heat transfer dynamics
defined as either adiabatic or not...which means heat either leaves the system (pipes)
or not...

cooling a pipe with a wind NEVER lowers the temperature below ambient!.. a frosted
pipe does not experience wind chill ...one cannot turn an apple into a banana no
matter how hard you try. WInd chill belongs to living beings and not pipes, radiators,
airplane wings, etc etc

period.

Lowering the temperature below ambient (in a living being) is wind chill!!

Other cooling effects/affect are in the realm of thermodynamics and not human wind chill.

QED

Respectfully,

RJC
____________________


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--------------------------------------------
On Mon, 1/1/18, 'Sandaidh' sandaidh@atlanticbb.net [DoIt_Yourself] <DoIt_Yourself@yahoogroups.com> wrote:

Subject: Re: [DIY] wind chill
To: DoIt_Yourself@yahoogroups.com
Date: Monday, January 1, 2018, 6:22 PM


 









So I asked a friend who happens to be an
engineer.



Question - are inanimate things like pipes affected by wind
chill?



<C> Uhm...to varying degrees, yes.



<C> Materials change in accordance with temperature,
and to the extent

evaporation cools the metal, it affects it. There are
thresholds of

behavior, as with mild steel, where some grades of steel
grow brittle and

take on new grades and forms of fracturability, loose
ductility, and

therefore strength.

<C> Some alloys of steel are magnetic at one
temperature but are not at

another



<C> Frozen pipes have additional factors at play, the
expansion of the

volume of water as it gives up latent heat to form ice one
of them.



Sandaidh

sandaidh@atlanticbb.net



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