Thermal Coefficients and their Relation to the Onsacer Coefficients
Nonequilibrium thermodynamics is a phenomenological theory of matter, which describes the behavior of a system due to differences within the system or between the system and its surroundings. These differences give rise to thermodynamic forces which can cause flows of quantities such as charge and energy. One example of such a force is the temperature gradient due to a temperature difference across the ends of a solid. The flow caused by this force is energy flow or heat current.
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