# Shocks and changes of shape of second sound wave

Ruggeri, Tommaso (1992) Shocks and changes of shape of second sound wave. Accademia Peloritana dei Pericolanti, Classe di Scienze FF. MM. NN., LXX . pp. 243-256.

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atti_3_1992_243.pdf - Submitted Version

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 $\tilde {\theta}$ characteristic of the materials and separating two farmilies of shocks, the "hot" and the "cold" 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.