Heat Transfer

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Heat Transfer

The transfer or exchange of heat by radiation, conduction, or convection within a substance and between the substance and its surroundings. </dd>
Radiation represents the transfer of radiant energy from one region to another by electromagnetic waves, with or without an intervening medium. Conduction, or diffusion of heat, implies the elastic impact of fluid molecules, without any net transfer of matter. Convection arises from the mixing of relatively large volumes of fluid because of the fluid motion and may be due either to local temperature inequalities (free convection) or to an applied pressure gradient (forced convection). </dd>


This article is based on NASA's Dictionary of Technical Terms for Aerospace Use