Two concepts of acoustic radiation pressure

Abstract

Two different concepts of the Langevin radiation pressure which are ultimately due to Langevin and Brillouin are discussed. The measurement of the radiation force on an absorber at oblique incidence can be regarded as an experimentum crucis in this respect. Herrey’s experimental result, which is confirmed by the author’s observations, is in favor of Brillouin. Some fundamentals and limitations of our present knowledge of the Langevin radiation force in nonabsorbing fluids are considered.

Acoustic radiation pressure in a three-dimensional lossy medium

“…However, there do exist other concepts of radiation pressure in a second small portion of the literature, wherein a treatment of so called acoustic radiation stress tensor in the Eulerian representation is given. [14][15][16] While this tensorial approach delivers a similar radiation pressure result as the conventional methods in simple one-dimensional lossless situation ͑see our remarks and discussions in this paper͒, explanation and calculation of radiation pressure or radiation force in more general problems seem to be difficult. One of the difficulties is that the space-time averages are interchangeable for a Lagrangian mean but are not interchangeable for an Eulerian mean.…”

“…15,16 They introduced a new concept: acoustic radiation stress tensor in the Eulerian presentation and employed a so called tensorial approach in the study of acoustic radiation pressure and radiation force in lossless media. As far as radiation pressure is considered, there exist some differences between our results and their results.…”

Amplitude-modulated acoustic radiation force experienced by elastic and viscoelastic spherical shells in progressive waves

“…The duration of the force application is determined by the temporal profile of the acoustic wave. Generally speaking, radiation force is a mean steady force [3][4][5][6][7][8] which, under the conditions at which it is measured, depends on the difference in the energy densities on the two sides of the target. A detailed theoretical study on a rigid sphere was developed [9] and extended [10] to include the effect of the sphere's compressibility.…”

Dynamic acoustic radiation force acting on cylindrical shells: theory and simulations

“…Only in recent years, radiation force has become of practical importance in nonlinear acoustics [2][3][4][5][6][7][8][9][10].…”