Example 5-ADD-3: The wind chill, which is experienced on cold windy days, is caused by increased
convective heat transfer from the exposed human skin to the surrounding atmosphere. We will model
the skin with a flat plate with its surface temperature of 25C, and place it in surrounding atmosphere
with air temperature of -5C. Compare the heat loss from the plate on a calm day, when the heat
transfer coefficient is 20W.m^(2).K^(-1), with that on a windy day, when the heat transfer coefficient is 40
W. m^(2).K^(-1). Additionally, calculate what the air temperature would need to be on a calm day to cause
the same heat loss as does the air temperature of -5C on a windy day. Finally, comment on your
findings.
Example 5-ADD-3:The wind chill, which is experienced on cold windy days,is caused by increased convective heat transfer from the exposed human skin to the surrounding atmosphere.We will model the skin with a flat plate with its surface temperature of 25 C, and place it in surrounding atmosphere with air temperature of -5 C. Compare the heat loss from the plate on a calm day, when the heat transfer coefficient is 20 W.m2.K-1, with that on a windy day, when the heat transfer coefficient is 40 W.m2.K-1. Additionally, calculate what the air temperature would need to be on a calm day to cause the same heat loss as does the air temperature of -5C on a windy day. Finally, comment on your findings.
