For the first-order dual-phase-lag model, temperature waves are bandpass-filtered, with underdamped oscillations confined to a wavevector (frequency) window; the peak quality factor is sqrt(1/Z-1) for a spatial pulse and Z^{-1/2} for a forced oscillation.
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Accessing temperature waves: a dispersion relation perspective
For the first-order dual-phase-lag model, temperature waves are bandpass-filtered, with underdamped oscillations confined to a wavevector (frequency) window; the peak quality factor is sqrt(1/Z-1) for a spatial pulse and Z^{-1/2} for a forced oscillation.