Sources of Finite Speed Temperature Propagation

Abstract The relation between heat flux and temperature gradient has been considered as a constitutive structure or balance law in different approaches. Both views may allow description of conduction characterized by finite speed propagation disturbances. Such result, which overcomes Fourier’s drawback infinite propagation, can be obtained also considering insufficient the representation conductor, even when it is to rigid, rather than sole gradient. We comment this last view describe intersection with previous proposals. Eventually, we show how under have traveling-wave-type thermal microstructures are accounted for.