Heat flow
The heat flow is a transmission of Chaleur (or thermal energy) through a body. The heat flow is expressed in W/m ².
In a solid, the heat flow follows the equation of Fourier. One calls heat flow crossing a given surface the quantity of heat which runs out, during the unit of time. Heat moves the hottest body with coldest until the temperature is stabilized. All the bodies (solid, liquid or gas) undergo this phenomenon of heat transfer. The use of insulating materials or a conducting material makes it possible to intervene on the intensity of transmitted heat. The first slows down the passage of heat, the second facilitates it. Heat is transmitted by conduction, radiation and convection. These modes of exchange “are very often cumulated” The international measuring unit of heat is the Joule (J). KWh, and the calorie can possibly be used.
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