THE EFFECT OF COMPRESSIBILITY ON ACOUSTIC STREAMING NEAR A RIGID BOUNDARY FOR A PLANE TRAVELING-WAVE

The effect of compressibility on acoustic streaming near a rigid bound ary is studied. The goal is to resolve an existing inconsistency: whil e the compressibility is a necessary condition for the propagation of acoustic waves, previous analyses of acoustic streaming are limited to incompressible fluids. Plane traveling waves are treated in the main text and the main results for a plane standing wave are presented in A ppendix B. it is shown that the inclusion of compressibility leads to a larger streaming velocity outside the boundary layer. The effect is significant in gases, but not in liquids.