Abstract
Trends observed in the experimental data of increasing deviation of pressure wave velocity from the nonslip homogeneous model, reported in Part (I), are explained from consideration of slip between the phases. The slip reduces the inertial effect of liquid and consequently brings about an increase in the wave propagation velocity. In order to testify quantitatively to the above interpretation by analysis of observed data, the theoretical approaches of perturbation method and Fourier transformation in time and space were applied to the fundamental equations of mass and momentum of each phase, taking the interaction between the phases as a function of the relative velocity only. The propagation velocities dependent on frequency were calculated from the characteristic equation derived by the above procedure, and fairly good agreement was obtained between theoretical and experimental data arranged with frequency as parameter. Applicability of linearization theory and relaxation of shock formation are physically discussed, and they are attributed also to attenuation effect by slip.
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