%0 Journal Article
%T Phonon gas and changes of shape of second sound wave
%A T. Ruggeri
%J Le Matematiche
%D 1991
%I University of Catania
%X A generalized non linear Maxwell-Cattaneo equation is used to study shock waves propagating in a rigid heat conductor at low temperature. Taking into account the experimental values for the second sound velocity, the existence of a critical temperature characteristic of the materials and separating two families of shocks, the ˇ°hotˇ± and the ˇ°coldˇ± ones, is proved both numerically and analytically. Finally a possible explanation of the distortion of the initial second sound thermal pulse during its propagation is proposed.
%U http://www.dmi.unict.it/ojs/index.php/lematematiche/article/view/631