If there is no internal energy conversion, the steady-state form of this process is described by Laplace's equation.
The ratio of proportionality constants for two different processes with this name are connected by the Lorenz number according to the Wiedemann-Franz law. In lumped system analyses of the transient form of this process, a number proportional to the internal resistance to this process, the Biot number, is used. If there is no internal energy conversion, the steady-state form of this process is described by Laplace's equation. The flux due to this process is equal to minus a proportionality constant - often abbreviated k - times the gradient of (*) temperature according to Fourier's law. For 10 points, name this mode of heat transfer that occurs by microscopic means - without macroscopic motion of a material - as opposed to convection and radiation.
The ratio of proportionality constants for two different processes with this name are connected by the Lorenz number according to the Wiedemann-Franz law.
thermal {conduction} [or word forms; prompt on heat transfer; prompt on heat transport]