Proposes to posit a clear definition of the energy stored in general electromagnetic media.
A general setting of thermodynamics using differential geometry is used and it is shown how the Poynting identity fits in.
A general method of defining the energy storage and dissipation in a general media is stated.
It appears that the definition of the energy stored in a dispersive media is not a state variable and depends on the history of the field variation.
If an electromagnetic model has to be coupled to a mechanical or thermal one, the associated forces and/or heat dissipations may not be clearly defined if one merely knows the electromagnetic constitutive relations.
It proposes a very general setting for the thermodynamic of electrodynamic media.
Nicolet, A. and Zolla, F. (2006), "On the definition of energy in general electromagnetic media", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 25 No. 1, pp. 55-63. https://doi.org/10.1108/03321640610634326Download as .RIS
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