| [Member (365WT)]answers [Chinese ] | Time :2019-09-02 | In the heat conduction phenomenon, the heat passing through a given section per unit time is proportional to the rate of temperature change and the cross-sectional area perpendicular to the interface direction, and the direction of heat transfer is opposite to the direction in which the temperature rises.
Thermal conduction in a solid is an atomic activity (phonon) derived from the form of lattice vibration. The modern view attributed this energy transfer to the lattice waves caused by atomic motion. In non-conductors, energy transfer depends only on lattice waves; in conductors (such as silver and iron), in addition to lattice waves, there is also the relaxation motion of free electrons. |
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