Mechanisms of Heat Transfer
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Evaporation
Conversion of a liquid to a vapor i.e. as water is evaporated from the surface of the skin, heat is removed.
Conduction
Direct transfer of heat through physical contact. i.e. you lose heat from skin to chair when you sit down on cold chair
Radiation
Transfer of heat as infrared rays from a warmer object to a cooler object without physical contact. i.e. when you feel heat wile sunbathing
Convection
Transfer of heat by the movement of a liquid or gas (fluids) between areas of different temperature. i.e. as your body conducts heat to the air next to your skin, the air wamrs, & rises, moving away from the skin.
