[lyner]

Wind chil? Absolutely. It's forced convection.

[Geezer]

Wind chil?

[Karen W.]

I think you are correct SC regarding heat capacity. We might say that large masses of air or water have enormous heat capacity relative to the heat a sheep can produce, so heat capacity is not relevant, but there must be localized effects as you suggest that are significant in the heat transport mechanisms.

Does "wind chill" depend on the heat capacity of air? I suspect it does.

BTW, I know at least some air cooled engines "cheated" to some extent because they relied heavily on the lubricating oil to remove heat. The oil circuit included an oil cooler. VW advised against the use of multigrade oil in their air cooled cars for a long time. I believe this was because "straight" mineral oil recovers its lubricating properties, even after reaching rather high temperatures, whereas the additives in multigrade oils break down at high temperatures, and the oil's properties are permanently altered. Because of this, I installed an oil temperature gauge in my first VW, but it didn't prevent it from dropping a valve which went on to wreck the entire engine! (I think that was really more to do with the fact that the engine was completely worn out - what do you expect for 35 quid?)

I have owned so many Volkswagon's it is not funny!

[Karen W.]

NEILY... STILL WHEN ONE IS IN THE WATER THERE IS A CERTAIN AMOUNT OF EVAPORATION HAPPENING WHILST MOVING AROUND AND SPLASHING WHICH WOULD CREATE A COLDER FEELING IN THE POOL CAUSE WHEN YOU GOT OUT YOU ABSORBED THE WATER INTO A TOWEL ELIMINATING THE EVAPORATION FACTOR WHICH MADE THE SKIN COOL.. wHEN COMPLETELY SUBMERGED THOSE PARTS OF THE SKIN WERE PROBABLY WARM UNTIL YOU MOVED  AND CHANGED THE WATER ON THE SKIN ALLOWING SOME AREAS TO BECOME COOL AS EVAPORATION BEGINS IMMEDIATELY WHEN EXPOSED TO THE AIR.

I HAVE THE SAME THING HAPPEN EVERY DAY IN THE POOL.

Oh poop..sorry about the caps!

[lyner]

Wind chil?

Save energy - avoid double leters.

[Geezer]

Wet wool also has insulating properties → http://adventure.howstuffworks.com/wool-when-wet1.htm.

Well, if you say so. I seem to remember that my first bathing suit was made of wool, but I don't remember being too warm and it seemed to me that it had every intention of drowning me because of the vast amount of water it retained.

[lyner]

Mine was wool, too. When you came out of the water, it could end up round your ankles, it was so full of water.

[Geezer]

Oh! Yes, I remember that too.  [:I]

If you tried to sell woolen swimming trunks today they'd likely be banned for health and safety reasons  []

[lyner]

And on the grounds of public decency.

[Lynda]

The conductivity of water could explain why we tend to feel cold when arriving indoors after walking in the rain without adequate waterproof clothing.

A few evenings ago I arrived home after a meeting about a mile away.  As I had to walk home, even if I had my umbrella, some of my clothes were a bit damp upon arrival at home. As I was shattered I flopped onto the settee as soon as I arrived home.    I soon felt cold even though the room temperature was 23 deg C - which is normally a good temperature for me.

Eventually I changed into dry clothes and warmed up.

[lyner]

Evaporation is a real factor with wet clothes.  It requires 2,200 kJ of energy  to keep warm and to evaporate 1kg of water. That would be an awful lot of your daily food intake. You could easily have a quarter of that in really wet clothes.
You could sit outside with wet clothes eating chocolate all day (?) - not quite.

[CZARCAR]

static layer of air on the skin actually insulates against heatloss?