Heat transfer
transport of thermal energy in physical systems
Heat transfer is the way the heat moves from one physical system (or body) to another. Heat transfer requires a difference in temperature.[1] Heat moves from the hotter body (higher temperature) to the colder one (lower temperature).[2] The bodies in question may be in a solid state, a liquid state or a gaseous state.[2] There are three modes of heat transfer: conduction, convection and radiation.[1]
