BREWSTER-ANGLE FOR FLUID-SOLID INTERFACES

The Brewster angle concept is generalized to elastic wave reflection from fluid-solid interfaces. For wave incidence from the fluid side, as there can be no incident or reflected SV wave, the Brewster angle is defined as the incident angle for which there is no reflection. It is proved that, in the sense of Snell's law, the Brewster angle is independent of the medium containing the incident wave(s), which, for incidence from the solid side are the P and SV waves. Regions of Brewster angle(s) are discussed in respect to fluid-solid properties. Numerical examples show the potential of Brewster angle reflection for industrial applications. (C) 1995 Academic Press Limited