Heat flux

（重定向自Thermal flux）

Heat flux or thermal flux is the rate of heat energy transfer through a given surface, per unit time. The SI derived unit of heat rate is joule per second, or watt. Heat flux density is the heat rate per unit area. In SI units, heat flux density is measured in [W/m]. Heat rate is a scalar quantity, while heat flux is a vectorial quantity. To define the heat flux at a certain point in space, one takes the limiting case where the size of the surface becomes infinitesimally small.

单词	Thermal flux
释义	Thermal flux 英语百科 Heat flux （重定向自Thermal flux） Heat flux or thermal flux is the rate of heat energy transfer through a given surface, per unit time. The SI derived unit of heat rate is joule per second, or watt. Heat flux density is the heat rate per unit area. In SI units, heat flux density is measured in [W/m]. Heat rate is a scalar quantity, while heat flux is a vectorial quantity. To define the heat flux at a certain point in space, one takes the limiting case where the size of the surface becomes infinitesimally small.
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