Approximate the human form as an unclothed vertical cylinder of 0.3 m diameter and 1.75 m length with a surface temperature of 30 oC.(a)Calculate the heat loss in a 10 m/s wind at 20 oC.(b)What is the heat loss if the skin is covered with a thin layer of water (i. e., sweat) at 30 oC and the relative humidity of the air is 60 %

Explanation:

From the question we are told that

Diameter of the cylinder

Length of the cylinder

Surface temperature of cylinder

Speed of air

Temperature of air

Generally the equation for Reynolds number is mathematically given by

where

Generally the equation for Nusselt number is mathematically given by

where

Prandtl number

Generally the equation for convective heat transfer is mathematically given by

where

Generally the equation for surface area of a cylinder is mathematically given by

Generally the equation for convective heat transfer is mathematically given by

graph slopes whilst gas cools, then it is flat whilst conensation to liquid happens, the coolong liquid then graphs as a slope when it solidifies graph is flat

latent heat