a study of plane wave propagation in anisotropic three-phase-lag and two-phase-lag model

the present paper deals with the study of plane wave propagation in anisotropic medium in the context of the theory of three-phase-lag model and two-phase-lag model. it is found that there exist one quasi-longitudinal wave (ql) and two transverse waves (qsh, qsv) and one quasi-longitudinal thermal wave (qlt). the governing equations for homogeneous transversely isotropic three-phase-lag are reduced as a special case and obtained that three coupled quasi waves and one quasi-transverse wave which is decoupled from rest of the motion. from the obtained results the different characteristics of waves like phase velocity, attenuation coefficient, specific loss and penetration depth are computed numerically and presented graphically.