What is wind chill?

Question

How does an increase in the velocity of wind at the outer wall affect the surface temperature?)

Answer 1

This is because in order to go from gas to liquid, or liquid to solid, water needs to give away energy in form of heat. When going from solid to liquid or liquid to gas, water needs to steal energy in form of heat.

The latter is the reason we perspire. If the wind increases, evaporation does too and this is what wind chill is.

The need to give or steal heat is also seen e.g. in frost. Because the mass of tiny water droplets is insignificant, the can be cooled to under freezing point. But when they meet e.g. the edge of a tree leave, they'll freeze instantly because the mass of the leave can dissipate the heat and they form the nice frost rim you can see early in the morning on a cold day.

Answer 2

Wind chill is the apparent temperature felt on the exposed skin due to the combination of air temperature and wind speed.It is the opposite of 'Heat index'.

Answer 3

Wind Chill simply means that it feels colder because of the effect of the wind.  If you stand outside in still air that is forty degrees there is no wind chill.  If the wind is blowing, it will make you feel colder.  So, "wind chill" simply explains how much colder if feels with the wind.  Let's say that the temperature is forty degrees but with the wind chill it feels like twenty degrees.  In other words, with the wind it feels like it would feel at twenty degrees without the wind.

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Answer 4

wind chill is simply just that moisture in that air on the skin with wind blowing over it as the wind is colder it begins to chill the air around you.   its just wind making it feel more cold than it actually is

Answer 5

Wind chill is the apparent temperature felt on exposed skin, which is a function of the air temperature and wind speed.

^^" Bai Bai.