Chilly Diesel Problems
 

"JimH" wrote in message
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"Calif Bill" wrote in message
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"JimH" wrote in message
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"Calif Bill" wrote in message
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"Calif Bill" wrote in message
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Wind Chill. I do not think it refers to living tissue. I think the
definition is how much heat transfer would occur in still air vs.
Moving air. some low speed of air. -15 degrees with a wind chill
of -30, says the same heat loss would occur if the temp was -30 and
no wind movement. Nothing to do with evaporation but with the
tendency of the air to heat up near the warmer object, slowing down
heat transfer.


The term "Wind Chill" applies *only* to living tissue. It refers to
the rate of cooling (limited by the ambient temperature) that occurs
to exposed living tissue. The increased rate of cooling can exceed
the living tissue's ability to replace the heat lost and things like
frostbite can quickly occur.

The wind can't make it colder. It only makes the rate of heat
transfer and cooling of the object faster. Heat transfer is higher in
turbulent flow.

Eisboch


Did not realize it applied only to human tissue. Thought it was just a
rate of heat transfer regards air movement.


Glad to see you finally got it. :-)



actually is the same whether it is tissue or beer cans.


sigh


Sigh my ass. The reason there is a Wind Chill factor is the wind will carry
away the extra BTU's that still air can not. The body's response is that
it tries to get to the ambient temperature faster. At the same speed as if
the air was xx degrees colder. The Wind Chill factor. Same reason that RCE
stated that turbulent flow will transfer more heat. Laminar flow will have
a small slow speed component of air right next to the surface. That small
bit of air will insulate the surface from the air above. Works with beer
cans also. Same reason that a car radiator works with air flowing over it.
No fan and hot day and sitting still and you overheat.

Chilly Diesel Problems
 

"Calif Bill" wrote in message
hlink.net...

"JimH" wrote in message
...


actually is the same whether it is tissue or beer cans.


sigh


Sigh my ass. The reason there is a Wind Chill factor is the wind will
carry away the extra BTU's that still air can not. The body's response
is that it tries to get to the ambient temperature faster. At the same
speed as if the air was xx degrees colder. The Wind Chill factor. Same
reason that RCE stated that turbulent flow will transfer more heat.
Laminar flow will have a small slow speed component of air right next to
the surface. That small bit of air will insulate the surface from the air
above. Works with beer cans also. Same reason that a car radiator works
with air flowing over it. No fan and hot day and sitting still and you
overheat.


I agree with everything you posted, including tissue or beer cans, except
the effect is not "wind chill". In moving air the tissue and beer can, if
warmer or colder than the ambient temperature will cool or warm faster to
the ambient temperature than in still air.

Wind chill is the apparent lower temperature (than ambient) that living
tissue experiences due to it's inability to keep up with the increased heat
loss in windy conditions. It is equal to that temperature the tissue would
be exposed to if there was no wind.

And with that, I am done with this wind chill discussion. It's leaving me
cold.

Eisboch

Chilly Diesel Problems
 

"RCE" wrote in message
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"JoeSpareBedroom" wrote in message
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Well anyway, it appears I've gone beyond my streak of good luck with
windshield fluid. 35 years of driving in frigid climates, and never a
problem until now, when I get not just one, but two products in a row
made by idiots or liars. The stuff's frozen in the tank, at 14 degrees F.


Well just think. Now, armed with your newly acquired knowledge, sue 'em!

Eisboch



Response from son's physics teacher: "Thermodynamics isn't my strong suit.
I'm consulting someone smarter than I am on the subject, and will get back
to you shortly".

At least he's honest. But, this is why my son insisted on finding a tutor
last year, when his curiosity went beyond what the teacher could explain.
:-( and :-), both.

Chilly Diesel Problems
 

On Feb 9, 12:43 am, "Calif Bill" wrote:
"JimH" wrote in message

...





"Calif Bill" wrote in message
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"JimH" wrote in message
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"Calif Bill" wrote in message
arthlink.net...

"RCE" wrote in message
news:ErGdnTJw1LKv8VbYnZ2dnUVZ_uKknZ2d@giganews .com...

"Calif Bill" wrote in message
. earthlink.net...

Wind Chill. I do not think it refers to living tissue. I think the
definition is how much heat transfer would occur in still air vs.
Moving air. some low speed of air. -15 degrees with a wind chill
of -30, says the same heat loss would occur if the temp was -30 and
no wind movement. Nothing to do with evaporation but with the
tendency of the air to heat up near the warmer object, slowing down
heat transfer.

The term "Wind Chill" applies *only* to living tissue. It refers to
the rate of cooling (limited by the ambient temperature) that occurs
to exposed living tissue. The increased rate of cooling can exceed
the living tissue's ability to replace the heat lost and things like
frostbite can quickly occur.

The wind can't make it colder. It only makes the rate of heat
transfer and cooling of the object faster. Heat transfer is higher in
turbulent flow.

Eisboch

Did not realize it applied only to human tissue. Thought it was just a
rate of heat transfer regards air movement.

Glad to see you finally got it. :-)

actually is the same whether it is tissue or beer cans.

sigh

Sigh my ass. The reason there is a Wind Chill factor is the wind will carry
away the extra BTU's that still air can not. The body's response is that
it tries to get to the ambient temperature faster. At the same speed as if
the air was xx degrees colder. The Wind Chill factor. Same reason that RCE
stated that turbulent flow will transfer more heat. Laminar flow will have
a small slow speed component of air right next to the surface. That small
bit of air will insulate the surface from the air above. Works with beer
cans also. Same reason that a car radiator works with air flowing over it.
No fan and hot day and sitting still and you overheat.

Agreed. But the beer or radiator fluid will not go below ambient
temperature no matter how much air you blow on it.

On the other hand, living tissue will and this is traditionally called
the Wind Chill factor.

Chilly Diesel Problems
 

"JimH" wrote in message
oups.com...
On Feb 9, 12:43 am, "Calif Bill" wrote:
"JimH" wrote in message

...





"Calif Bill" wrote in message
hlink.net...

"JimH" wrote in message
. ..

"Calif Bill" wrote in message
arthlink.net...

"RCE" wrote in message
news:ErGdnTJw1LKv8VbYnZ2dnUVZ_uKknZ2d@giganews .com...

"Calif Bill" wrote in message
. earthlink.net...

Wind Chill. I do not think it refers to living tissue. I think
the
definition is how much heat transfer would occur in still air vs.
Moving air. some low speed of air. -15 degrees with a wind chill
of -30, says the same heat loss would occur if the temp was -30
and
no wind movement. Nothing to do with evaporation but with the
tendency of the air to heat up near the warmer object, slowing
down
heat transfer.

The term "Wind Chill" applies *only* to living tissue. It refers
to
the rate of cooling (limited by the ambient temperature) that
occurs
to exposed living tissue. The increased rate of cooling can exceed
the living tissue's ability to replace the heat lost and things
like
frostbite can quickly occur.

The wind can't make it colder. It only makes the rate of heat
transfer and cooling of the object faster. Heat transfer is higher
in
turbulent flow.

Eisboch

Did not realize it applied only to human tissue. Thought it was
just a
rate of heat transfer regards air movement.

Glad to see you finally got it. :-)

actually is the same whether it is tissue or beer cans.

sigh

Sigh my ass. The reason there is a Wind Chill factor is the wind will
carry
away the extra BTU's that still air can not. The body's response is
that
it tries to get to the ambient temperature faster. At the same speed as
if
the air was xx degrees colder. The Wind Chill factor. Same reason that
RCE
stated that turbulent flow will transfer more heat. Laminar flow will
have
a small slow speed component of air right next to the surface. That
small
bit of air will insulate the surface from the air above. Works with beer
cans also. Same reason that a car radiator works with air flowing over
it.
No fan and hot day and sitting still and you overheat.

Agreed. But the beer or radiator fluid will not go below ambient
temperature no matter how much air you blow on it.

On the other hand, living tissue will and this is traditionally called
the Wind Chill factor.


The flesh will not go below ambient temperature. Wind chill is the apparent
amount of heat that would be lost if the temperature was lower. If the
temperature is 5f and a wind chill is -30f, the flesh will lose heat at
the same rate as if there was no wind and the temperature was -30. But the
flesh will not go below 5f. If it tried to go below 5f, then the Wind Chill
Factor would be the
Wind Heating factor.

Chilly Diesel Problems
 

Calif Bill wrote:
"JimH" wrote in message
oups.com...
On Feb 9, 12:43 am, "Calif Bill" wrote:
"JimH" wrote in message

...





"Calif Bill" wrote in message
link.net...
"JimH" wrote in message
...
"Calif Bill" wrote in message
hlink.net...
"RCE" wrote in message
...
"Calif Bill" wrote in message
link.net...
Wind Chill. I do not think it refers to living tissue. I think
the
definition is how much heat transfer would occur in still air vs.
Moving air. some low speed of air. -15 degrees with a wind chill
of -30, says the same heat loss would occur if the temp was -30
and
no wind movement. Nothing to do with evaporation but with the
tendency of the air to heat up near the warmer object, slowing
down
heat transfer.
The term "Wind Chill" applies *only* to living tissue. It refers
to
the rate of cooling (limited by the ambient temperature) that
occurs
to exposed living tissue. The increased rate of cooling can exceed
the living tissue's ability to replace the heat lost and things
like
frostbite can quickly occur.
The wind can't make it colder. It only makes the rate of heat
transfer and cooling of the object faster. Heat transfer is higher
in
turbulent flow.
Eisboch
Did not realize it applied only to human tissue. Thought it was
just a
rate of heat transfer regards air movement.
Glad to see you finally got it. :-)
actually is the same whether it is tissue or beer cans.
sigh
Sigh my ass. The reason there is a Wind Chill factor is the wind will
carry
away the extra BTU's that still air can not. The body's response is
that
it tries to get to the ambient temperature faster. At the same speed as
if
the air was xx degrees colder. The Wind Chill factor. Same reason that
RCE
stated that turbulent flow will transfer more heat. Laminar flow will
have
a small slow speed component of air right next to the surface. That
small
bit of air will insulate the surface from the air above. Works with beer
cans also. Same reason that a car radiator works with air flowing over
it.
No fan and hot day and sitting still and you overheat.
Agreed. But the beer or radiator fluid will not go below ambient
temperature no matter how much air you blow on it.

On the other hand, living tissue will and this is traditionally called
the Wind Chill factor.


The flesh will not go below ambient temperature. Wind chill is the apparent
amount of heat that would be lost if the temperature was lower. If the
temperature is 5f and a wind chill is -30f, the flesh will lose heat at
the same rate as if there was no wind and the temperature was -30. But the
flesh will not go below 5f. If it tried to go below 5f, then the Wind Chill
Factor would be the
Wind Heating factor.



Sigh, you do realize he will never understand it.

Chilly Diesel Problems
 

"Calif Bill" wrote in message
hlink.net...


The flesh will not go below ambient temperature. Wind chill is the
apparent amount of heat that would be lost if the temperature was lower.
If the temperature is 5f and a wind chill is -30f, the flesh will lose
heat at the same rate as if there was no wind and the temperature was -30.
But the flesh will not go below 5f. If it tried to go below 5f, then the
Wind Chill Factor would be the
Wind Heating factor.


I'll buy that.

Eisboch

Chilly Diesel Problems
 

"Eisboch" wrote in message
. ..

"Calif Bill" wrote in message
hlink.net...


The flesh will not go below ambient temperature. Wind chill is the
apparent amount of heat that would be lost if the temperature was lower.
If the temperature is 5f and a wind chill is -30f, the flesh will lose
heat at the same rate as if there was no wind and the temperature
was -30. But the flesh will not go below 5f. If it tried to go below 5f,
then the Wind Chill Factor would be the
Wind Heating factor.


I'll buy that.

Eisboch


I did get an A in Thermodynamics!

Chilly Diesel Problems
 

"Calif Bill" wrote in message
link.net...

"Eisboch" wrote in message
. ..

"Calif Bill" wrote in message
hlink.net...


The flesh will not go below ambient temperature. Wind chill is the
apparent amount of heat that would be lost if the temperature was lower.
If the temperature is 5f and a wind chill is -30f, the flesh will lose
heat at the same rate as if there was no wind and the temperature
was -30. But the flesh will not go below 5f. If it tried to go below
5f, then the Wind Chill Factor would be the
Wind Heating factor.


I'll buy that.

Eisboch


I did get an A in Thermodynamics!


That's pretty good. In my humble opinion thermodynamics and fluid flow are
among, if not the most, challenging engineering disciplines to master and
apply. That's why I stuck with simple stuff like electronics. I struggled
with Ohm's Law.

Eisboch

Chilly Diesel Problems
 

"Calif Bill" wrote in message
link.net...

"Eisboch" wrote in message
. ..

"Calif Bill" wrote in message
hlink.net...


The flesh will not go below ambient temperature. Wind chill is the
apparent amount of heat that would be lost if the temperature was lower.
If the temperature is 5f and a wind chill is -30f, the flesh will lose
heat at the same rate as if there was no wind and the temperature
was -30. But the flesh will not go below 5f. If it tried to go below
5f, then the Wind Chill Factor would be the
Wind Heating factor.


I'll buy that.

Eisboch


I did get an A in Thermodynamics!


I obviously defer to your expertise Bill. Thanks for setting the record
straight on this. ;-)