3-Dimensional Induced He II Waves on the Constitutive Model

概要

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A constitutive model of helium II is perturbed by a pulsating body force and apulsating fluid source, both having arbitrary anisotropic distributions. The model iscompressible, viscous and heat conducting. The general solution has complex wavenumbers, anisotropic amplitudes and some isotropic features. Long-range decays arespherical and partially-but-dominantly exponential. Viscosity waves form one wavespecies found only in the velocity perturbation. Waves of two other species propagatewith all perturbations; they each implicate both ordinary and second sounds; thosepropagating with the velocity perturbation and a generalised velocity perturbation areirrotational waves. When specific heats nearly coincide, those other two wave-speciesseparately approximate ordinary sound and second sound; also, a nonfree perturba-Lion system supports viscosity waves and ordinary sound and weakly supports secondsound, while a freelike perturbation system weakly supports ordinary and secondsounds; both systems are weakly coupled. Uncoupling occurs with coincidence ofspecific heats.
社団法人日本物理学会の論文
1986-02-15