Sound Propagation in Gas Mixtures

Publisher Website
Google Scholar
Abstract
An earlier treatment of the propagation of sound in mixtures of two gases is generalized and simplified somewhat. The essential point of the theory is the consideration of the internal energy variations by the assignment of fictitious internal state temperatures which, in the simplest case assumed here, are taken to be constant for each of the component gases. The long wave-length velocity expression is directly interpretable as a Laplace formula for a gas of mean reciprocal mass and averaged specific heat. From a more general point of view the velocity of propagation of infinitesimal waves is always given by the Laplace result provided a frequency variation of specific heats be recognized. Explicit mention is made of the detailed effect of viscosity and the two conductivities. Experimental data support theory.

This publication has 3 references indexed in Scilit: