Acoustic radiation force and streaming induced by non-periodic ultrasound

Abstract

Starting from the linear flow of homogeneous fluid, five modes are defined as eigenvectors of the basic system of conservation laws. Quasi-plane geometry is considered. Projectors that separate overall perturbation of the fluid into specific modes are calculated and applied to nonlinear flow. Dynamic equations for the interacting modes are obtained in the frames of the method. A particular case of streaming caused by acoustic pulse is considered, illustrations on temporal behavior of streaming velocity and streamlines are presented.